Patent ID: 7842390

Claim:
A composite material prepared by mixing a chain end functionalized fluoropolymer and a dielectric material; wherein the chain end functionalized fluoropolymer has the following formula: X-(fluoropolymer)-Y (I) wherein, fluoropolymer represents the polymerization product of vinylidene fluoride (VDF) and a second monomer selected from the group consisting of a fluoromonomer, a mixture of fluoromonomers, and a mixture of one or more non-fluoromonomers and one or more hydrocarbon monomers, wherein the second monomer has from 2 to 15 carbon atoms; X and Y are independently the same or a different terminal group provided that at least one of X or Y is selected from the group consisting of Si(R) n (OH) 3-n , Si(R) n (OR) 3-n , OH, COOH, COOR, anhydride, ammonium, immidazolium, sulfonium, and phosphonium ions, wherein n is from 0 to 2, and R is a C 1 -C 6 alkyl group, and wherein the chain end functionalized fluoropolymer has a breakdown electric field of more than 100 MV/m and a dielectric constant of at least 10 when measured at any temperature between 20 and 100° C.