Title of Invention

"FUNCTIONALLY GRADED MAGNETIC MATERIALS AND A METHOD FOR PREPARATION OF THE SAME"

Abstract

A novel functionally graded magnetic materials have been developed by using polymer matrix, nano/micron sized magnetic materials and other chemicals, i.e., accelerator(s), curing agent(s), accelerator activator(s), process oil(s) and antioxidant(s). Nano/micron sized magnetic materials i.e., Fe, Co, Ni, Nd2Fei4B, SmCo5, SmiCon, BaO.6FeaO3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, and mixture thereof etc are used to make the graded materials. The gradation of nano/micron particles comprises a varying particles size and weight% in rectangular and cylindrical and other complex geometries. Finally functionally graded magnets are characterized through magnetic and mechanical properties.

Full Text

FIELD OF THE INVENTION: The present invention relates to functionally graded magnetic materials and a method for preparation of the same. BACKGROUND OF THE INVENTION Polymer bonded magnets, now a day omnipresent in modern societies supplanting other conventional magnets of their metallic and ceramic counterparts because of their numerous advantages over them. Main advantages include ease of processing, forming and machining which subsequently follows to feast on other advantages like high production rate, economy of production, etc. Another advantage of polymer bonded magnets is the ability to mold onto another object such as a shaft, hub or into a can. Magnetic properties can be imparted to the polymers by impregnating/doping magnetic particles into it. Calendering uses magnetic powders up to 65 volume percent. The remaining portion is a binder. Polymer bonded magnets have the unique characteristic that their properties can easily be acclimated according to the requirements for a given particular application. Radar absorption is an example where the particular values of dielectric constant and magnetic permeability are required as a criterion for the materials choice to wield. The compatibility of electronic devices with various electromagnetic environments has become a substantial issue now a days. Rubber radar absorbing material (RAM) is an expedient shielding material that attenuates electromagnetic interference (EMI), a concerned environmental pollution, as it is flexible and can easily be clipped. Rubber ferrite composites (RFCs), to a greater extent, are used as microwave absorbers and they can form complex shapes retaining their flexibility and hence superseding ceramic magnetic materials where shape is a monumental criteria. Carbonyl iron can also be used as filler for microwave absorption in the frequency range 2-25 GHz. High values of magnetic permeability and dielectric constant in microwave frequency range, high saturation magnetization and high curie temperature enables it to be widely used for electromagnetic shielding/absorption. Rubber-carbonyl iron composites are optimally suited for improving communication environments including wireless access. It is also specially preferred where thickness of the composite is the mooting issue. Not a single paper/note is available on functionally graded magnet based on polymer matrix. OBJECT OF THE INVENTION A primary object of the present invention is to provide functionally graded magnetic materials and a method for preparation of the same in which magnetic characteristics as well as functions/parameters of magnetic characteristics can be obtained. SUMMARY OF THE INVENTION In the present invention functionally graded magnetic materials has been developed. Another embodiment of the present invention comprises a method to fabricate functionally graded polymer composites having various shape (Fig 1) and gradation using polymer matrix(s), nano/micron sized magnetic particle(s), antioxidant(s), accelerator(s), accelerator activator(s), processing oil(s) and curing agent(s). Another embodiment of the present invention comprises various nano/micron sized particles i.e., Fe, Co, Ni, Nd2Fe14B, SmCo5, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, etc which are used to make a novel functionally graded magnetic materials. Here, the concentration of nano/micron sized particles decreases or increases according to the requirement, but the particle size remains constant in each graded magnets. Another embodiment of the present invention comprises various nano/micron sized particles i.e., Fe, Co, Ni, Nd2Fe14B, SmCo5, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3 etc which are also used to make functionally graded magnetic materials. Here, the total weight% of nano/micron sized particles in functionally graded magnetic materials is constant but the particle size of nano/micron particles decreases or increases from one surface to the opposite surface. Another embodiment of the present invention comprises various mixed nano/micron sized magnetic particles i.e., combination of any two or more following materials, i.e., Fe, Co, Ni, Nd2Fe,4B, SmCo5, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, etc which are also used to make functionally graded magnetic materials. Here, both concentration and particle size of nano/micron sized particles decreases or increases at a time. Another embodiment of the present invention comprises various polymer (elastomer) matrix i.e., natural rubber, styrene-butadiene rubber, polybutadiene rubber, polyisoprene rubber, ethylene propylene rubber, butyl rubber, halobutyl rubber, nitrile rubber, polyacrylic rubber, neoprene rubber, hypalone rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, etc, which are used to make a novel functionally graded magnetic materials. Another embodiment of the present invention comprises various mixed polymer (elastomer) matrix i.e., combination of any two or more of the following rubbers, i.e., natural rubber, styrene-butadiene rubber, polybutadiene rubber, polyisoprene rubber, ethylene propylene rubber, butyl rubber, halobutyl rubber, nitrile rubber, polyacrylic rubber, neoprene rubber, hypalone rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, etc, which are used to make a novel functionally graded magnetic materials. Another embodiment of the present invention comprises various geometries i.e., rectangular, cylindrical, complex geometry, etc which are used to make a novel functionally graded magnetic materials using template (Fig. 1). Another embodiment of the present invention comprises various hollow geometries i.e,, rectangular, cylindrical including complex irregular geometry, which is used to make a novel functionally graded magnetic materials using template (Fig 1). BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein: Fig 1: Types of functionally graded magnet. Fig. 2(a) Variation of saturation magnetization for various iron loadings in functionally graded magnet (up to 500 %)as a function of applied field. 2(b) Variation of saturation magnetization for other iron loadings (from 500 to 1200%) as a function of applied field. 2(c) Variation of saturation magnetization for various iron loadings in functionally graded as function of applied field. Fig. 3 (a) Variation of saturation magnetization as a function of iron loading. 3(b) Variation of saturation magnetization as a function of nickel loading. Fig. 4(a) Variation of remanent magnetization as a function of iron loading. 4(b) Variation of remanent magnetization as a function of nickel loading. Fig. 5(a) Variation of coercivity as a function of iron loading. 5(b) Variation of coercivity as a function of nickel loading. Fig. 6 (a) Variation of tensile strength and elongation at break as a function of loading of iron. 6(b) Variation of tensile strength and elongation at break as a function of loading of nickel. Fig. 7(a) shows the variation in the Mod @ 100 % and Mod @ 200 % elongation with filler loading. 7(b) Variation of modulus @ 100 % and 200 % elongation as a function of loading of nickel Fig. 8 (a) Variation of hardness and specific gravity with iron loading in functionally graded magnet. 8(b) Variation of hardness and specific gravity with nickel loading in functionally graded magnet. DETAILED DESCRIPTION OF THE INVENTION w.r.t. the accompanying drawings: This invention provides a functionally graded magnetic materials comprising of a polymer matrix(s), nano/micron sized magnetic filler(s) and other chemicals i.e., antioxidant(s), accelerator(s), accelerator activator(s), processing oil(s) and curing agent(s). A process for preparation of the functionally graded magnetic materials comprising the steps of :- nario/micron sized magnetic particle(s) in an amount of 1 to 1200 by wt% with respect to 100 polymer and all other chemicals (wt percentage is constant for these chemicals) are imbedded in the polymer matrix at the semisolid state (i.e. above the glass transition temperature but below the melting point of polymer) by two roll mixing mill a thin layer ~ 0.1 mm is prepared from the nano/micron particles imbedded polymer matrix again by two roll mill and hydraulic press at the semisolid state thereafter, this thin nano/micron particles imbedded polymer matrix is optionally coated on both sides with coating agents (ie, silicon, spray, soap solution, silicon, emulsion solution, stearic acid, polytetrafluoro ethylene, polyvinly alcohol, etc then this thin coated/uncoated nano/micron particles imbedded polymer matrix is cut into the required size using template the cut piece is laminated either in increasing or decreasing order as per requirement (shown in fig, 1) to obtain green functionally graded magnetic materials the green graded sheet is kept in the coated mould (coating of the mould is done by any. one of these silicon spray, soap solution, silicon emulsion solution, stearic acid, polytetrafluoro ethylene, polyvinly alcohol, etc) the mould with green graded sheet is cured for a certain period of time at a specified temperature and pressure to get a cured functionally graded magnetic materials (temperature is applied from one or both sides according to the type of functionally graded magnetic materials (as shown in fig. 1) then the cured functionally graded magnetic materials is removed from the mould after curing and cooling at room temperature. The polymer matrix is selected from the group comprising of natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene-monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide rubber, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer, and mixture thereof. The polymer matrix natural rubber is selected from the group comprising of standard malaysian rubber (SMR) L, SMR CV, SMR WF, SMR GP, SMR LV, SMR 5, SMR 10, SMR 20, SMR 50, technically specified rubbers (TSR) 5, TSR 10, TSR 20, TSR 50, technically classified rubber, oil extended natural rubber, deproteinized natural rubber, peptized natural rubber, skim natural rubber, superior processing natural rubber, heveaplus MG rubber, epoxidized natural rubber, thermoplastic natural rubber, and mixture thereof; the polymer matrix styrene-butadiene rubber is selected from the group comprising of solution styrene-butadiene rubber i.e., SBR 2305, SBR 2304, emulsion styrene-butadiene rubber i.e., cold SBR 1500, cold SBR 1502, hot SBR 100, and mixture thereof; the polymer matrix polybutadiene rubber is selected from the group comprising of cisamer-01, cisamer!220, BR 9000, BR 9004A, BR 9004B, low molecular weight 1, 3 polybutadiene, and mixture thereof; the polymer matrix butyl rubber is selected from the group comprising of IIR-1751, IIR-1751F, IIR-745, Exxon butyl 007, Exxon butyl 065, Exxon butyl 068, Exxon butyl 165, Exxon butyl 268, Exxon butyl 269, Exxon butyl 365, polysar butyl 100, polysar butyl 101, polysar butyl 101-3, polysar butyl 301, polysar butyl 402, and mixture thereof; the polymer matrix ethylene-propylene rubber is selected from the group comprising of dutral-CO-034, dutral-CO-038, dutral-CO-043, dutral-CO- 054, dutral-CO-058, dutral-CO-059, dutral-CO-055, and mixture thereof; the polymer matrix ethylene-propylene-diene-monomer rubber is selected from the group comprising of ethylene-propylene-dicyclopentadiene rubber, ethylene-propylene- ethylidenenorbornene rubber, ethylene-propylene-1, 4 hexadiene rubber, and mixture thereof; the polymer matrix halobutyl rubber is selected from the group comprising of Exxon chlorobutyl 1065, Exxon chlorobutyl 1066, Exxon chlorobutyl 1068, Polysar chlorobutyl 1240, Polysar chlorobutyl 1255, Exxon bromobutyl 2222, Exxon bromobutyl 2233, Exxon bromobutyl 2244, Exxon bromobutyl 2255, Polysar bromobutyl X2, Polysar bromobutyl 2030, and mixture thereof; the polymer matrix nitrile rubber is selected from the group comprising of Krynac-2750, Nipol-1053, Nipol-1032, Paracril-C, Chemigum-N-3, Krynac-5075, and mixture thereof; the polymer matrix hydrogenated nitrile rubber is selected from the group comprising of zetpol-1010, zetpol-1020, zetpol-2010, zetpol-2020, therban, and mixture thereof; the polymer matrix polyacrylic rubber is selected from the group comprising of hycar-4051, hycar-4052, hycar-4054, vamac-B-124, and mixture thereof; the elastomer matrix neoprene rubber is selected from the group comprising of neoprene-AC, neoprene-AD, neoprene-ADG, neoprene-AF, neoprene-AG, neoprene-FB, neoprene-GN, neoprene-GNA, neoprene-GRT, neoprene-GS, neoprene-GW, neoprene-W, neoprene-W-MI, neoprene-WB, neoprene-WD, neoprene-WHV, neoprene-WHY-100, neoprene-WHV-200, neoprene-WHV-A, neoprene-WK, neoprene-WRT, neoprene-WX, neoprene-TW, neoprene-TW-100, neoprene-TRT, and mixture thereof; the polymer matrix hypalon rubber is selected from the group comprising of hypalon-20, hypalon-30, hypalon-LD-999, hypalon-40S, hypalon-40, hypalon-4085, hypalon-623, hypalon-45, hypalon-48S, hypalon-48, and mixture thereof; the elastomer matrix silicone rubber is selected from the group comprising of silicone MQ, silicone MPQ, silicone MPVQ, silicone FVQ, and mixture thereof; the polymer matrix fluorocarbon rubber is selected from the group comprising of viton-LM, viton-C-10, viton-A-35, viton-A, viton-A-HF, viton-E-45, viton-E-60, viton-E-60C, viton-E403, viton-B-50, viton-B, viton-B-70, viton-910, viton-GLT, viton-GF, viton-VTR-4730, DAI-EL-G-101, DAI-EL-701, DAI-EL-751, DAI-EL-702, DAI-EL-704, DAI-EL-755, DAI-EL-201, DAI-EL-501, DAI-EL-801, DAI-EL-901, DAI-EL-902, tecnoflon-FOR-LHF, tecnoflon-NMLB, tecnoflon-NML, tecnoflon-NMB, tecnoflon-NM, tecnoflon-NH, tecnoflon-FOR-45-45BI, tecnoflon-FOR-70-70BI, tecnoflon-FOR-45-C-CI, tecnoflon-FOR-60K-KI, tecnoflon-FOR-50E, tecnoflon-TH, tecnoflon-TN-50, tecnoflon-TN, tecnoflon-FOR-THF, tecnoflon-FOR-TF-50, tecnoflon-FOR-TF, fluorel-2145, fluorel-FC-2175, fluorel-FC-2230, fluorel-FC-2178, fluorel-FC-2170, fluorel-FC-2173, fluorel-FC-2174, fluorel-FC-2177, fluorel-FC-2176, fluorel-FC-2180, fluorel-FC-81, fluorel-FC-79, fluorel-2152, fluorel-FC-2182, fluorel-FC-2460, fluorel-FC-2690, fluorel-FC-2480, and mixture thereof, the polymer matrix polyurethane rubber (polyether and polyester type) is selected from the group comprising of FMSC-1035, FMSC-1035T, FMSC-1040, FMSC-1050, FMSC-1060, FMSC-1066, FMSC-1070, FMSC-1075, FMSC-1080-SLOW, FMSC-1080-FAST, FMSC-1085, FMSC-1090-FAST, FMSC-1090-SLOW, and mixture thereof; the polymer matrix thermoplastic elastomer (polyurethane, polyester, polyamide, styrene-butadiene-styrene, blends, etc) is selected from the group comprising of SBS 1401, SBS 4402, SBS 4452, SBS 1301, SBS 1401-1, SBS 4303, estane-55103, hytrel-40xy, hytrel-63xy, hytrel-72xy, gaflex-547, pebax-2533, pebax-6333, TPR-1600, TPR-1900, TPR-2800, TELCAR-340, SOMEL-301, SOMEL-601, santoprene, cariflex-TR, solprene-400, stereon, and mixture thereof; the polymer matrix polysulfide elastomer is selected from the group comprising of thiakol-A, thiakol-B, thiakol-FA, thiakol-ST, and mixture thereof. The polymer matrix natural rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix styrene-butadiene rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polybutadiene rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix butyl rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, p-quinone dioxime, p- quinone dioxime dibenzoate, phenol-formaldehyde resin, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix ethylene- propylene rubber is cured by vulcanizing agent selected from the group comprising of hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5- dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix ethylene-propylene-diene-monomer rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix halobutyl rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, zinc oxide, p-quinone dioxime, p-quinone dioxime dibenzoate, phenol-formaldehyde resin, amine, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix nitrile rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix hydrogenated nitrile rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polyacrylic rubber is cured by vulcanizing agent selected from the group comprising of amine, diamine, activated thiol, sulphur, thiourea, trithiocyanuric acid, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); ; polymer matrix neoprene rubber is cured by vulcanizing agent selected from the >up comprising of magnesium oxide, zinc oxide, lead oxide, iron oxide, titanium oxide, line, phenol, sulfenamide, thiazoles, thiuram, thiourea, guanidine, and mixture thereof tich is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer itrix hypalon rubber is cured by vulcanizing agent selected from the group comprising magnesium oxide, zinc oxide, lead oxide, iron oxide, titanium oxide, sulphur, drogen peroxide, dicumyl peroxide, benzoyl peroxide, N,N'-m-phenylenedimaleimide, tine, phenol, sulfenamide, thiazoles, thiuram, thiourea, guanidine, and mixture thereof dch is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer itrix silicone rubber is cured by vulcanizing agent selected from the group comprising hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5- nethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary tyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect the 100 polymer); the polymer matrix fluorocarbon rubber is cured by vulcanizing snt selected from the group comprising of hydrogen peroxide, dicumyl peroxide, tizoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, ;(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, hexamethylenediamine carbamate, bis(cinnamylidene) hexamethylenediamine, hydroquinone, 4-4'-isopropylidene bisphenol or mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polyurethane rubber (polyether and polyester type) is cured by vulcanizing agent selected from the group comprising of 1,4-butanediol, 1,4-cyclohexanedimethanol, 1,4-bis(2-hydroxyethoxy) benzene, 4,4'methylene-bis(2-chloroaniline), and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix thermoplastic elastomer (polyurethane, polyester, polyamide, styrene-butadiene-styrene, blends, etc) is cured by vulcanizing agent selected from the group comprising of lead oxide, cadmium oxide, zinchydroxide, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); and the polymer matrix polysulfide elastomer is cured by vulcanizing agent selected from the group comprising of lead oxide, cadmium oxide, zinchydroxide, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, hexamethylenediamine carbamate, bis(cinnamylidene) hexamethylenediamine, hydroquinone, 4-4'-isopropylidene bisphenol, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) The polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is graded by nano/micron particles selected from the group comprising of Fe, Co, Ni, Nd2Fe14B, SmCo5, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, and mixture thereof which is in the range of 1 to 1200 (wt%, with respect to the 100 polymer). The polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further graded by mixed nanoparticles having same concentration gradient but different particle size i.e 5 nm to 50 micron and selected from the group comprising of Fe, Co, Ni, Nd2Fe14B, SmCos, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, and mixture thereof which is in the range of 1 to 1200 (wt%, with respect to the 100 polymer). The curing of polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further accelerated by accelerator selected from the group comprising of tert-buttylbenzthiazyl sulphonamide, benzthiazyl 2-sulphenmorpholide, dicyclohexyl benzthiazyl sulphonamide, N-cyclohexyl-2-benzothiazole sulfenamide, 2-mercaptobenzothiazole, 2,2'dibenzothiazyl disulfide, tetramethylthiuram disulfide, zinc dimethyldithiocarbamate, zinc dibutyldithiocarbamate, 4,4'dithiodimorpholine, tellurium diethyldithiocarbamate, dipentamethylene thiuramhexasulfide, tetramethylthiuram monosulfide, ferricdimethyldithiocarbamate, zinc mercaptobenzthiazole, zinc 0,0 dibutylphosphorodithioate, zinc diethyldithiocarbamate, 4-4'dithio dimorpholine, which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) and , and mixture thereof in a ratio of 1 : 10 to 10:1 (by wt). The curing of polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further accelerated by accelerator activator selected from the group comprising of metal oxide and acid which is in the range of 10:1 to 1:10 (by wt%, with respect to 100 polymer). The metal oxide used in accelerator activator is selected from the group comprising of zinc oxide, lead oxide, calcium oxide, magnesium oxide, lead oxide, etc which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). The acid used in accelerator activator is selected from the group comprising of stearic acid, palmitic acid, oleic acid, etc which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). The antioxidant is selected from the group comprising of condensation product of acetone and diphenyl-amine, phenyl-beta-napthylamine, blends of diphenyl-p-phenylene diamine and selected arylamine derivatives, blend of arylamines, polymerized 1,2 dihydro 2,2,4-trimethyl quinoline, N-(l,3-dimethylbutyl)-N'-phenyl-p-phenylene-diamine, diaryl para phenylene diamines, 2 mercaptobenzimidazole, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). The process oil is selected from the group comprising of paraffinic oil, naphthenic oil, aromatic oil, vegetable oil, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). The nanoparticles and other chemicals imbedded polymer matrix is prepared by mixing the polymer and other compounding ingredients by methods such as open roll mixing using two roll mill or internal mixing kenader or intermix or banbary mixer. The thin polymer layer (before curing) is prepared by two roll mill at a temperature range from about 50°C to about 125°C depending on the type of polymer, and at a friction ratio from about 1:1.1 to about 1:1.5 to selectively produce a thin layer within the range of 0.1 to 10 mm in thickness. Thin polymer layer is optionally coated by one or more coating agent selected from the group comprising of polytetrafluoro ethylene, polyvinyl alcohol, silicone emulsion and detergent/soap solution. The green graded nanocomposites is prepared by laminating of thin polymer layer so as to produce a rectangular sheet having a thickness within the range of 2 to 1000 mm or unlimited in higher side, or cylindrical shape having a diameter within the range of 10 to 100 mm or unlimited in higher side. The green graded nanocomposites of rectangular/cylindrical shape is cured by hydraulic press in the temperature range of 100°C to about 200°C for 10 minutes to about 8 hours and pressure in the range of 1 MPa to about 15 MPa. The wt% of nanomaterials is varied within the range of 1 to 1200 (wt% based on 100 polymer) from the inner surface to outer surface or from outer surface to inner surface (Fig 1) or from outer surface to outer surface i.e., opposite surface (Fig 1). In the functionally graded magnetic materials the orifice both regular and irregular, i.e., complex geometry including its dimension (as shown in Fig 1) are made from one surface to the opposite surface using template; and the concentration of nanomaterials at the inner surface could be varied from 0 to any level less than 1200 wt% (based on 100 polymer) according to the requirement; and the dimension of orifice could be varied using template. The various properties associated with magnetic filler loading are as follows. Materials and Processing: Fe, Co, Ni, Nd2Fe,4B, SmCo5, Sm2Co17, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, etc is directly used for mixing with polymer(s). Various loadings of filler content are added to polymer(s) apart from the regular recipe as shown in Table 1. All these ingredients are homogeneously mixed in a two-roll mixer and then molded and vulcanized at 100-200°C in an electrically heated hydraulic press according to ASTM D-15 to make functionally graded magnet. The processing method adopted for the preparation of functionally graded magnet is different. Herein, the thin layers of uncured homogeneous mixes containing increasing or decreasing (varied) wt% of magnetic filler(s) are stacked on each other and the stacked layers are molded and vulcanized in the press. With an application of pressure, the thin layers infuse into adjacent layers so as to form a smoothly graded composite. (Table Removed) Measurements: Magnetic Measurement: Magnetic properties of functionally graded magnet with different loadings of magnetic powder are studied using DMS Model 4 Vibrating sample magnetometer. The saturation magnetization (Ms), coercive field, remanent magnetization are measured at room temperature for these magnets. Hardness Measurement: The hardness of the functionally graded magnet is measured with a Shore A durometer according to ASTM D-2240 and specific gravity of the functionally graded magnet for respective loading is calculated from the density values of the compounds. Tensile Measurement: Tensile strength, modulus and elongation at break are the important properties to study the employability of the material for a given particular application. Mechanical Properties of the functionally graded magnet are determined using Zwick/Roell Z010 model. Dumbbell shaped samples containing varied loadings of the magnetic filler are cut from the sheets using-type-A die. Tensile strength, modulus @ 100 %, modulus @ 200 % and elongation @ break are determined for the samples containing different loadings of the filler content in accordance with ASTM D-412. Magnetic measurements are carried out on functionally graded magnets for various loadings of magnetic fillers. Magnetic parameters like saturation magnetization (Ms), coercivity (Hc), remanent magnetization (Mr) are determined. From the hysteresis-loop curves for various iron and nickel contents in the functionally graded magnet, it can be observed that saturation magnetization increases with increasing iron content in the functionally graded magnet. Fig. 2(a) shows the hysteresis curves for iron loadings varying from 10 to 500 % in the functionally graded magnet. It is clear that the rate of the increment in the saturation magnetization is rapid for the initial loadings and is moderate up to 400 % iron loading. From Fig. 2(b), it can be seen that with further loadings of iron from 400 % onwards, the rate of increment of saturation magnetization becomes lenient. The agglomeration of the magnetic fillers might be the cause of this lenient incremental rate. With superfluous addition of the filler, probability of agglomerate formation increases that results in cancellation of magnetic lines of forces within the system and hence resultant saturation magnetization hardly differs. The saturation magnetization values corresponding to 10, 50, 100, 200, 400 and 1000 wt% iron are 16, 59, 85, 1 14, 146 and 177 emu/gm respectively. All other parameters are noted and plotted against the loading of the filler. Fig. 3(a) shows the variation of saturation magnetization as a function of iron loading. Saturation magnetization increases with increasing iron content in the functionally graded magnet. It shows that the increment in the magnetization with loadings of iron is not linear. There is a rapid increment in the saturation magnetization with initial loadings of the filler and the degree of steepness slowly decreases. After 400 % iron, the saturation magnetization increases mildly. Attempts have been made to calculate the saturation magnetization of the functionally graded magnet for any given amount of the filler from the Ms value and weight fraction of the filler only. Rule of mixture is introduced to calculate the magnetization values for different loadings of the filler. MFGM=WFMF +WPMp ....(1) where WF, Wp and MF, MR are the weight fractions and saturation magnetizations of the filler and polymer matrix respectively while MFGM is the magnetization of the functionally graded magnet. As the matrix is non-magnetic, the equation reduces to, WFMF ...(2) The calculated Ms values of functionally graded magnet i.e. MFGM are plotted along with the measured Ms values as shown in the Fig. 3(a, b). The calculated MS values of the functionally graded magnet from the rule of mixture are much closer to the experimental Ms values for the initial loadings of the filler (Fe and Ni both) till the curve follows linearity. With the deviation of the curve from linearity, the difference between the calculated and experimental Ms values magnifies. For superfluous loadings of the filler, rule of mixture is not applicable to predict the Ms value of the functionally graded magnet. From the experimental data of Ms for different loadings of the filler, it is observed that the Boltzmann fit gave the least error (R2 ~ 0.99) and the is represented by the general formula, (Figure Removed) dWP where (MFGM)is the saturation magnetization of the functionally graded magnet corresponding to any given weight fraction of the filler, WF is the weight of the filler in phr and remaining AI, A2, WFO and dWF are constants. The values of the constants in the fit are shown in Fig. 3 (a). This equation is checked using Ni as different filler (with same particle size) in functionally graded magnet. It is observed that the experimental plot of Ms with various loadings of Ni in the functionally graded magnet follows the Boltzmann fit only. The corresponding constants for Ni loading are also shown in Fig. 3(b). The closer agreement between the measured and the experimental values of the saturation magnetization assists in tailoring the different appropriate materials (with known saturation magnetization values) and loading required in a given polymer to fulfill the material properties needed for a given application. Remanent magnetization is the permanent magnetization that remains after the external field is removed. Fig. 4 shows the increasing trend of remanent magnetization with increasing magnetic filler in the polymer matrix. With increasing loading of the filler, saturation magnetization increases, which increases the remanent magnetization. Once the saturation magnetization saturates (~ 400 % as shown in Fig. 2), a corresponding saturation of remanent magnetization is observed Fig. 2(b). Fig. 4(b) follows the same trend for nickel. Coercivity is defined as the intensity of the magnetic field required to reduce the magnetization of that material to zero after the magnetization of the sample has reached saturation. Fig. 5(a) shows the variation of coercivity with loading of the iron. With increasing loading, coercive field is increasing. Fig. 5(b) shows that coercivity is hardly depending on the loading of nickel in the polymer matrix. There is hardly any difference between the coercivity values of the pure magnetic fillers (either iron or nickel) and the functionally graded magnet. Mechanical properties for functionally graded magnets are prerequisite as many applications demand for certain extents of mechanical loading. Tensile test is carried out to measure the ability of the material to sustain tensile forces and elongation before it breaks. Tensile strength, modulus and elongation at break are the important properties to study the serviceability of the material. The information regarding matrix-filler interaction, dispersion of the filler and percolation threshold can possibly be understood from the mechanical and magnetic measurements. Mechanical properties of functionally graded magnet strongly depend on interfacial interaction between the filler and the matrix. It is also influenced by the filler size, shape, dispersion and its amount in the matrix. The change in tensile strength and % elongation at break with the. variation of the iron loading in functionally graded magnet is shown in Fig. 6(a). Tensile strength is increasing with initial loadings of the filler and decreases again with further loadings. Tensile strength of gum compound itself is much lesser as it lacks of self-reinforcing (due to stress induced crystallization) qualities of SBR polymer. Tensile strength increases from 1.45 MPa to 1.85 MPa for the loading variation from 0 to 400 % and falls down to 1.15 MPa at 1000 % loading. Elongation at break for the gum compound is 250 % only and increases continuously with increasing loading. It reaches maximum to 450 % at 700 % loading and remains roughly constant with superfluous loading also. With addition of Ni particles, tensile strength decreases in the same fashion from 1.45 to 0.92 MPa while % elongation plateaus to 250 % throughout the loading. Figs. 7(a) and 7(b) shows the variation in the Mod @ 100 % and Mod @ 200 % elongation with iron and nickel filler respectively. Both mod. @ 100 % and mod @ 200 % increase with initial loading and decreases again with further loading. It follows the same trend as the tensile strength. The corresponding drop in tensile strength as well as in the modulus of the composite directs the attention on the agglomeration formed due to the superfluous amount of filler in the functionally graded magnet. Mod @ 100 % increases from 0.86 to 1 MPa while mod @ 200 % increases from 1.11 to 1.17 MPa with filler variation from 0 to 300 % and decreases correspondingly from 1 to 0.74 MPa and from 1.17 to 0.81 MPa when filler content varies from 300 to 1000 % respectively. Mechanical characterizations reveal that the magnetic properties can be imparted without compromising on the flexibility even at much higher loadings. The hardness pattern of functionally graded magnet is studied for various loadings of iron. With increasing loadings of iron in functionally graded magnet, hardness increases as shown in Fig. 8(a). There are three distinct regions wherein one can see the difference in the rate of change of hardness. The rate of increment in hardness is steeper for the initial loadings up to 100-150 %, moderate up to 400 % and increases abruptly at 500 % and becomes moderate again with surplus addition of the filler to the matrix. Hardness value varies from 40 shore A for 0% to 94 shore A for 1200 % loadings of iron. For the initial loadings of the filler up to 100%, hardness value jumps from 40 to 52 shore A. With additional loading of the hard filler, hardness increases at moderate rate up to 400 % iron. This is the maximum limit of filler addition having uniform dispersion with smaller agglomerates formed. Ni particles are also dispersed in the SBR polymer matrix in different amounts and hardness of different composite specimens is measured. The corresponding plot of hardness against the loading of Ni particles shows the similar kind of trend (Fig. 8(b)). Hardness varies from 40 shore A for the 0% compound to 91 shore A for 1000 % Ni. Specific gravity of the functionally graded magnet is also calculated for different weight fractions of the iron and is plotted against the loading as shown in Fig. 8(a). Increment in the specific gravity is gradual and varies from 0.98 for the 0% to 4.92 for 1200 % iron as it only depends on the weight fractions of the dense filler and light matrix. Specific gravity increases from 0.98 for the 0% to 4.91 for 1000 % Ni. Examples Example A: 10 gm metal oxide/s, 6 gm acid/s, 6 gm antioxidant/s, 1 to 4800 gm (interval of 10 gm) magnetic materials (variable), 10 gm processing oil/s, 10 gm curing agent/s and 7 gm accelerator/s are mixed in 400 gm polymer/s at a temperature of 50 to 125°C for 10 to 150 minutes and at friction ratio of 1:1.1 to 1:1.5 by two roll mixing mill. After uniform mixing of all these chemical ingredients in to the matrix, a thin sheet of thickness in the range of 0.1 to 10 mm (based on our requirement) is prepared at a temperature of 50 to 125°C and at friction ratio of 1:1.1 to 1:1.5 in a same two roll mixing mill. The both sides of this thin sheet/s are optionally coated with coating agents. The coated/uncoated thin sheet is kept in hydraulic press in between two teflon sheet and pressed again to make a very thin sheet of thickness less than 0.1 mm. The coated/uncoated thin sheets are laminated to the desired thickness to make a green functionally graded magnets either increasing or decreasing order of nano/micron particles and/or using template. The split steel die is preheated before putting these green functionally graded magnets in it. The preheating is done in a hydraulic press at a temperature of 100 to 200°C. After temperature is reached close to the desired temperature, the green functionally graded magnets are filled in the die and the other half is placed over it. The temperature of 100 to 200°C and pressure of 1 to 15 MPa and time of 10 minutes to 8 hours are selected in such a way so as to get cured functionally graded magnets. The cured functionally graded magnets are taken out from the mould. Measurements of magnetic and mechanical properties are carried out to know its performance for high tech application. Example B: 32 gm metal oxide/s, 10 gm acid/s, 11 gm antioxidant/s, 1 to 8400 gm nano/micron material/s (variable, interval of 10 gm), 25 gm processing oil/s, 20 gm curing agent/s and 11 gm accelerator/s are mixed in 700 gm polymer/s at a temperature of 50 to 125°C for 10 to 150 minutes and friction ratio of 1:1.1 to 1:1.5 by two roll mixing mill. The green functionally graded magnets are prepared as per method described in example 1. The green functionally graded magnets are filled in the die and the other part of the die is placed over it at a temperature of 100 to 200°C. The pressure is 1 to 15 MPa. The temperature and pressure are maintained for 10 minutes to 8 hours. The cured functionally graded magnets are taken out from the mould. Now the functionally graded magnets are characterized by magnetic and mechanical properties to know its performance for high tech application. ADVANTAGES OF THE INVENTION AS COMPARED TO PRIOR ART 1) The processing method adopted to prepare the functionally graded magnet is easier with lesser processing cost (cost of forming and machining) that subsequently follows to feast on other advantages like high production rate, economy of production, etc. 2) Functionally graded magnet does not crack on bending. 3) Both isotropic as well as anisotropic functionally graded magnets can easily be prepared with the above technique mentioned. 4) Saturation magnetization of the functionally graded magnet increases by 900 % for the filler variation from 10 to 1100 phr along the sheet thickness of 2 mm. 5) Remanent Magnetization also follows the enhancement path in the same way as of saturation magnetization. It increases by 2200 % along the distance (sheet thickness 2mm). 6) The increment in coercivity is 88 % along the sheet thickness of 2 mm. 7) The % enhancement in the hardness is 125% along the sheet thickness of 2 mm. 8) The % enhancement in the specific gravity is 400% along the sheet thickness of 2 mm. 9) Tensile strength decreases by only 25% 10) No change in % elongation @ break%. 11) Magnetically anisotropic functionally graded sheets enhance the magnetization that widens the scope of applications where firm holding is required. 12) It makes possible to stack all the different layers contiguous and parallel with each other without coating any adhesive between the stacking layers. A multilayered functionally graded magnetic structure is possible without any adhesive layer between them. 13) The base material used is polymer so that it can easily be clipped and conformed to different structures, as it is flexible. 14) The gradation of loading of the magnetic filler along the thickness of the composite sheet has also led to the broadband absorption of the unwanted electromagnetic waves. 15) A wide range of gradation is possible i.e., 0 to 1200 % by weight with respect to 100 polymer. 16) One surface is non magnetic whereas the opposite surface is magnetic, so it acts as a multifunctional material. Commercial potential 1) Show wide range of applications in computer line printers and memories, magnetic rolls etc. 2) Magnetic chuck for fastening thin, small workpieces on grinding, EDM etc, 3) Bearing sleeves, timing motor rotors, clamps, speedometers, tachographs, video tape recorders etc. 4) Flexible magnetic sheets can be used for price cards, road signs, display boards etc. 5) Widely used in the applications where low noise is required e.g. a micro-motor magnet for micro DC motors as it can absorb shock and sound. 6) Magnetic memo holder for refrigerator decoration, stationary etc. 7) Toy magnets widely used for magnetic darts, magnetic tablet etc. 8) Die cut magnets used for puzzles, games, business cards, picture frames etc. 9) Polymer bonded magnets for educational purposes etc. Automotive: Starter motors, Anti-lock braking systems (ABS), Motor drives for wipers, Injection pumps, Fans and controls for windows, seats etc, Loudspeakers, Eddy 1 current brakes, Alternators. Telecommunications: Loudspeakers, Microphones, Telephone ringers, Electro-acoustic pick-ups, Switches and relays Data Processing: Disc drives and actuators, Stepping motors, Printers. Consumer Electronics: DC motors for showers, Washing machines, Drills, Low voltage DC drives for cordless appliances, Loudspeakers for TV and Audio, TV beam correction and focusing device, Compact-disc drives, Home computers, Video Recorders, Clocks. Electronic and Instrumentation: Sensors, Contactless switches, NMR spectrometer, Energy meter disc, Electromechanical transducers, Crossed field tubes, Flux-transfer trip device, Dampers. Industrial: DC motors for magnetic tools, Robotics, Magnetic separators for extracting metals and ores, Magnetic bearings, Servo-motor drives, Lifting apparatus, Brakes and clutches, Meters and measuring equipment. Astro and Aerospace: Frictionless bearings, Stepping motors, Couplings, Instrumentation, Traveling wave tubes, Auto-compass. Biosurgical: Dentures, Orthodontics, Orthopaedics, Wound closures, Stomach seals, Repulsion collars, Ferromagnetic probes, Cancer cell separators, Magnetomotive artificial hearts, NMR / MRI body scanner. It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:- WE CLAIM 1. A functionally graded magnetic materials comprising of a polymer matrix(s), nano/micron sized magnetic filler(s) and other chemicals such as antioxidant(s), accelerator(s), accelerator activator(s), processing oil(s) and curing agent(s). 2. A process for preparation of a functionally graded magnetic materials comprising steps of: i. mixing of magnetic particle(s) and other chemical(s) into polymer matrix(s), ii. preparation of a thin layer followed by lamination of cut piece to obtain green functionally graded magnetic materials, and iii. curing of the green graded sheet in a coated mould. 3. A process for preparation of a functionally graded magnetic materials as claimed in claim 2 wherein both sides of the thin nano/micron particles imbedded polymer matrix and mould are subjected to step of coating (optionally) with a coating agent such as silicon spray, detergent/soap solution, silicone emulsion solution, stearic acid, polytetrafluro ethylene, polyvinyl alcohol etc. 4. A functionally graded magnetic materials and a process for preparation'of the same as claimed in claim 1 or 2 wherein the magnetic particles is in an amount of 0-1200 %by wt with respect to 100 polymer and the antioxidant, acid, processing oil, metal oxide, accelerator and curing agent are 1-10% by weight with respect to the polymer. 5. The functionally graded magnetic materials as claimed in Claim 1 wherein the polymer matrix is selected from the group comprising of natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene-monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide rubber, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer, and mixture thereof. 6. The functionally graded magnetic materials as claimed in Claim 5 wherein the polymer matrix natural rubber is selected from the group comprising of standard malaysian rubber (SMR) L, SMR CV, SMR WF, SMR GP, SMR LV, SMR 5, SMR 10, SMR 20, SMR 50, technically specified rubbers (TSR) 5, TSR 10, TSR 20, TSR 50, technically classified rubber, oil extended natural rubber, deproteinized natural rubber, peptized natural rubber, skim natural rubber, superior processing natural rubber, heveaplus MG rubber, epoxidized natural rubber, thermoplastic natural rubber, and mixture thereof; the polymer matrix styrene-butadiene rubber is selected from the group comprising of solution styrene-butadiene rubber i.e., SBR 2305, SBR 2304, emulsion styrene-butadiene rubber i.e., cold SBR 1500, cold SBR 1502, hot SBR 100, and mixture thereof; the polymer matrix polybutadiene rubber is selected from the group comprising of cisamer-01, cisamer!220, BR 9000, BR 9004A, BR 9004B, low molecular weight 1, 3 polybutadiene, and mixture thereof; the polymer matrix butyl rubber is selected from the group comprising of IIR-1751, IIR-1751F, IIR-745, Exxon butyl 007, Exxon butyl 065, Exxon butyl 068, Exxon butyl 165, Exxon butyl 268, Exxon butyl 269, Exxon butyl 365, polysar butyl 100, polysar butyl 101, polysar butyl 101-3, polysar butyl 301, polysar butyl 402, and mixture thereof; the polymer matrix ethylene-propylene rubber is selected from the group comprising of dutral-CO-034, dutral-CO-038, dutral-CO-043, dutral-CO- 054, dutral-CO-058, dutral-CO-059, dutral-CO-055, and mixture thereof; the polymer matrix ethylene-propylene-diene-monomer rubber is selected from the group comprising of ethylene-propylene-dicyclppentadiene rubber, ethylene-propylene- ethylidenenorbornene rubber, ethylene-propylene-1, 4 hexadiene rubber, and mixture thereof; the polymer matrix halobutyl rubber is selected from the group comprising of Exxon chlorobutyl 1065, Exxon chlorobutyl 1066, Exxon chlorobutyl 1068, Polysar chlorobutyl 1240, Polysar chlorobutyl 1255, Exxon bromobutyl 2222, Exxon bromobutyl 2233, Exxon bromobutyl 2244, Exxon bromobutyl 2255, Polysar bromobutyl X2, Polysar bromobutyl 2030, and mixture thereof; the polymer matrix nitrile rubber is selected from the group comprising of Krynac-2750, Nipol-1053, Nipol-1032, Paracril-C, Chemigum-N-3, Krynac-5075, and mixture thereof; the polymer matrix hydrogenated nitrile rubber is selected from the group comprising of zetpol-1010, zetpol-1020, zetpol-2010, zetpol-2020, therban, and mixture thereof; the polymer matrix polyacrylic rubber is selected from the group comprising of hycar-4051, hycar-4052, hycar-4054, vamac-B-124, and mixture thereof; the elastomer matrix neoprene rubber is selected from the group comprising of neoprene-AC, neoprene-AD, neoprene-ADG, neoprene-AF, neoprene-AG, neoprene-FB, neoprene-GN, neoprene-GNA, neoprene-GRT, neoprene-GS, neoprene-GW, neoprene-W, neoprene-W-MI, neoprene-WB, neoprene-WD, neoprene-WHY, neoprene-WHY-100, neoprene-WHV-200, neoprene-WHV-A, neoprene-WK, neoprene-WRT, neoprene-WX, neoprene-TW, neoprene-TW-100, neoprene-TRT, and mixture thereof; the polymer matrix hypalon rubber is selected from the group comprising of hypalon-20, hypalon-30, hypalon-LD-999, hypalon-40S, hypalon-40, hypalon-4085, hypalon-623, hypalon-45, hypalon-48S, hypalon-48, and mixture thereof; the elastomer matrix silicone rubber is selected from the group comprising of silicone MQ, silicone MPQ, silicone MPVQ, silicone FVQ, and mixture thereof; the polymer matrix fluorocarbon rubber is selected from the group comprising of viton-LM, viton-C-10, viton-A-35, viton-A, viton-A-HF, viton-E-45, viton-E-60, viton-E-60C, viton-E403, viton-B-50, viton-B, viton-B-70, viton-910, viton-GLT, viton-GF, viton-VTR-4730, DAI-EL-G-101, DAI-EL-701, DAI-EL-751, DAI-EL-702, DAI-EL-704, DAI-EL-755, DAI-EL-201, DAI-EL-501, DAI-EL-801, DAI-EL-901, DAI-EL-902, tecnoflon-FOR-LHF, tecnoflon-NMLB, tecnoflon-NML, tecnoflon-NMB, tecnoflon-NM, tecnoflon-NH, tecnoflon-FOR-45-45BI, tecnoflon-FOR-70-70BI, tecnoflon-FOR-45-C-CI, tecnoflon-FOR-60K-KI, tecnoflon-FOR-50E, tecnoflon-TH, tecnoflon-TN-50, tecnoflon-TN, tecnoflon-FOR-THF, tecnoflon-FOR-TF-50, tecnoflon-FOR-TF, fluorel-2145, fluorel-FC-2175, fluorel-FC-2230, fluorel-FC-2178, fluorel-FC- 2170, fluorel-FC-2173, fluorel-FC-2174, fluorel-FC-2177, fluorel-FC-2176, fluorel-FC-2180, fluorel-FC-81, fluorel-FC-79, fluorel-2152, fluorel-FC-2182, fluorel-FC-2460, fluorel-FC-2690, fluorel-FC-2480, and mixture thereof, the polymer matrix polyurethane rubber (polyether and polyester type) is selected from the group comprising of FMSC-1035, FMSC-1035T, FMSC-1040, FMSC-1050, FMSC-1060, FMSC-1066, FMSC-1070, FMSC-1075, FMSC-1080-SLOW, FMSC-1080-FAST, FMSG-1085, FMSC-1090-FAST, FMSC-1090-SLOW, and mixture thereof; the polymer matrix thermoplastic elastomer (polyurethane, polyester, polyamide, styrene-butadiene-styrene, blends, etc) is selected from the group comprising of SBS 1401, SBS 4402, SBS 4452, SBS 1301, SBS 1401-1, SBS 4303, estane-55103, hytrel-40xy, hytrel-63xy, hytrel-72xy, gaflex-547, pebax-2533, pebax-6333, TPR-1600, TPR-1900, TPR-2800, TELCAR-340, SOMEL-301, SOMEL-601, santoprene, cariflex-TR, solprene-400, stereon, and mixture thereof; the polymer matrix polysulfide elastomer is selected from the group comprising of thiakol-A, thiakol-B, thiakol-FA, thiakol-ST, and mixture thereof; 7. The functionally graded magnetic materials as claimed in Claim 6 wherein the polymer matrix natural rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix styrene-butadiene rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polybutadiene rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix butyl rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, p-quinone dioxime, p-quinone dioxime dibenzoate, phenol-formaldehyde resin, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix ethylene-propylene rubber is cured by vulcanizing agent selected from the group comprising of hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix ethylene-propylene-diene-monomer rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, diurethane, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix halobutyl rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, zinc oxide, p-quinone dioxime, p-quinone dioxime dibenzoate, phenol-formaldehyde resin, amine, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix nitrile rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix hydrogenated nitrile rubber is cured by vulcanizing agent selected from the group comprising of sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polyacrylic rubber is cured by vulcanizing agent selected from the group comprising of amine, diamine, activated thiol, sulphur, thiourea, trithiocyanuric acid, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix neoprene rubber is cured by vulcanizing agent selected from the group comprising of magnesium oxide, zinc oxide, lead oxide, iron oxide, titanium oxide, amine, phenol, sulfenamide, thiazoles, thiuram, thiourea, guanidine, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix hypalon rubber is cured by vulcanizing agent selected from the group comprising of magnesium oxide, zinc oxide, lead oxide, iron oxide, titanium oxide, sulphur, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, N,N'-m-phenylenedimaleimide, amine, phenol, sulfenamide, thiazoles, thiuram, thiourea, guanidine, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix silicone rubber is cured by vulcanizing agent selected from the group comprising of hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix fluorocarbon rubber is cured by vulcanizing agent selected from the group comprising of hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, hexamethylenediamine carbamate, bis(cinnamylidene) hexamethylenediamine, hydroquinone, 4-4'-isopropylidene bisphenol or mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix polyurethane rubber (polyether and polyester type) is cured by vulcanizing agent selected from the group comprising of 1,4-butanediol, 1,4-cyclohexanedimethanol, 1,4-bis(2-hydroxyethoxy) benzene, 4,4'methylene-bis(2-chloroaniline), and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); the polymer matrix thermoplastic elastomer (polyurethane, polyester, polyamide, styrene-butadiene-styrene, blends, etc) is cured by vulcanizing agent selected from the group comprising of lead oxide, cadmium oxide, zinchydroxide, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer); and the polymer matrix polysulfide elastomer is cured by vulcanizing agent selected from the group comprising of lead oxide, cadmium oxide, zinchydroxide, hydrogen peroxide, dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane, bis(2,4-dichloro-benzoyl) peroxide, tertiary butyl perbenzoate, hexamethylenediamine carbamate, bis(cinnamylidene) hexamethylenediamine, hydroquinone, 4-4'-isopropylidene bisphenol, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) 8. The functionally graded magnetic materials as claimed in Claim 1 wherein the polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is graded by nano/micron particles selected from the group comprising of Fe, Co, Ni, Nd2Fei4B, SmCo5, Sm2Coi17 BaO.6Fe203, SrO.6Fe203, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, and mixture thereof which is in the range of 0 to 1200 (wt%, with respect to the 100 polymer) and wherein the polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene- propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further graded by mixed nanoparticles having same concentration gradient but different particle size i.e 5 run to 50 micron and selected from the group comprising of Fe, Co, Ni, Nd2Fei4B, SmCos, Sm2Con, BaO.6Fe2O3, SrO.6Fe2O3, Fe 3wt% Si, Fe 4wt% Si, Fe 35wt% Co, Fe 78wt% Ni, Fe 50wt% Ni, MnO.Fe2O3, and mixture thereof which is in the range of 0 to 1200 (wt%, with respect to the 100 polymer) and wherein the curing of polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene- propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further accelerated by accelerator selected from the group comprising of tert-buttylbenzthiazyl sulphonamide, benzthiazyl 2-sulphenmorpholide, dicyclohexyl benzthiazyl sulphonamide, N-cyclohexyl-2-benzothiazole sulfenamide, 2-mercaptobenzothiazole, 2,2'dibenzothiazyl disulfide, tetramethylthiuram disulfide, zinc dimethyldithiocarbamate, zinc dibutyldithiocarbamate, 4,4'dithiodimorpholine, tellurium diethyldithiocarbamate, dipentamethylene thiuramhexasulfide, tetramethylthiuram monosulfide, ferricdimethyldithiocarbamate, zinc mercaptobenzthiazole, zinc 0,0 dibutylphosphorodithioate, zinc diethyldithiocarbamate, 4-4'dithio dimorpholine, which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) and , and mixture thereof in a ratio of 1 : 10 to 10:1 (by wt) 9. The functionally graded magnetic materials as claimed in Claim 1 wherein the curing of polymer matrix comprising of either natural rubber, polyisoprene rubber, styrene- butadiene rubber, polybutadiene rubber, ethylene-propylene rubber, ethylene-propylene diene monomer rubber, butyl rubber, halobutyl rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide elastomer, polyacrylic rubber, neoprene rubber, hypalon rubber, silicone rubber, fluorocarbon rubber, polyurethane rubber, thermoplastic elastomer and/or mixture thereof is further accelerated by accelerator activator selected from the group comprising of metal oxide and acid which is in the range of 10:1 to 1:10 (by wt%, with respect to 100 polymer) wherein the metal oxide used in accelerator activator is selected from the group comprising of zinc oxide, lead oxide, calcium oxide, magnesium oxide, lead oxide, etc which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) and the acid used in accelerator activator is selected from the group comprising of stearic acid, palmitic acid, oleic acid, etc which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). 10. The functionally graded magnetic materials as claimed in Claim 1 further comprises an antioxidant selected from the group comprising of condensation product of acetone and diphenyl-amine, phenyl-beta-napthylamine, blends of diphenyl-p-phenylene diamine and selected arylamine derivatives, blend of arylamines, polymerized 1,2 dihydro 2,2,4- trimethyl quinoline, N-(l,3-dimethylbutyl)-N'-phenyl-p-phenylene-diamine, diaryl para phenylene diamines, 2 mercaptobenzimidazole, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer) and a process oil is selected from the group comprising of paraffinic oil, naphthenic oil, aromatic oil, vegetable oil, and mixture thereof which is in the range of 1 to 10 (wt%, with respect to the 100 polymer). 11. The functionally graded magnetic materials as claimed in Claim 2 wherein the thin polymer layer (before curing) is prepared by two roll mill at a temperature of 50°C to about 125°C according to the type of rubber, and at a friction ratio of about 1:1.1 to about 1:1.5 to selectively produce a thin layer of thickness 0.1 to 10 mm. 12. The functionally graded magnetic materials as claimed in Claim 1 or 2 wherein the green graded nanocomposites is prepared by laminating of thin polymer layer to produce a rectangular sheet having a thickness within the range of 2 to 1000 mm or unlimited in higher side, or cylindrical shape having a diameter within the range of 10 to 100 mm or unlimited in higher side wherein the green graded nanocomposites of rectangular/cylindrical shape is cured by hydraulic press in the temperature range of 100°C to about 200°C for 10 minutes to about 8 hours and at pressure of 1 MPa to about 15 MPa wherein the weight% of nanomaterials is varied within the range of 0 to 1200 wt% (based on 100 polymer) from the inner surface to outer surface or from outer surface to inner surface (Fig 1) or from outer surface to outer surface i.e., opposite surface (Fig 1).

Documents:

680-del-2007-Abstract-(24-02-2014).pdf

680-del-2007-abstract.pdf

680-del-2007-Claims-(24-02-2014).pdf

680-del-2007-claims.pdf

680-del-2007-Correspondance Others-(24-12-2014).pdf

680-del-2007-Correspondence Others-(24-02-2014).pdf

680-del-2007-correspondence others.pdf

680-del-2007-description (complete).pdf

680-del-2007-drawings.pdf

680-del-2007-form-1.pdf

680-del-2007-form-2.pdf

Abstract-(04-12-2014).pdf

Claims-(04-12-2014).pdf

Correspondence Others-(04-12-2014).pdf

Form-1-(04-12-2014).pdf

GPA-(04-12-2014).pdf