Chain end functionalized fluoropolymers having good electrical properties and good chemical reactivity
AssigneesThe Penn State Research Foundation, Daikin America, Inc.
InventorsTze-Chiang Chung, Zhicheng Zhang, Shangtao Chen, Katsuyoshi Kubo, Koji Kigawa
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Abstract
Chain end functionalized fluoropolymers are disclosed exhibiting good chemical reactivity high breakdown electric field (E>100 MV/m) and high dielectric constants (i.e., ∈>10). The polymers can be prepared by functional initiators and from a variety of fluoromonomers including vinylidene difluoride together with one or more additional monomers. The polymers can be combined with other dielectric materials to form composites having uniform composition and morphology.
Claims13
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 C1-C6 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.
A composite material comprising a chain end functionalized fluoropolymer and a second 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 a functional terminal 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.;
- and
- wherein said second material is a corresponding fluoropolymer, without functional groups, that is compatible with the chain end functionalized fluoropolymer.
Dependencies are inferred from the claim text.