Patent ID: 8349513
Filing Date: 2013-01-08
Classification: C08F,C08J,C08L,H01B,H01M,Y02E

Abstract:
1. A polymer electrolyte membrane, comprising as a main ingredient a block copolymer comprising: a polymer block (A2a); a polymer block (A2b); and a polymer block (B), wherein: the polymer block (A2a) comprises as a main unit an aromatic vinyl compound unit represented by formula (II): wherein Ar 2 represents an aryl group having 6 to 14 carbon atoms which aryl group can have 1 to 3 substituents, and R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 14 carbon atoms which aryl group can have 1 to 3 substituents, and the polymer block (A2a) has ion-conducting groups on the aromatic rings of the aromatic vinyl compound unit; the polymer block (A2b) forms a restraining phase and comprises a crystalline polyolefin block or a polymer block (A2b1) comprising as a main unit an aromatic vinyl compound unit represented by formula (III): wherein each of R 2 to R 4 represents, mutually independently, a hydrogen atom or an alkyl group having 1 to 8 carbon atoms but at least one of them is an alkyl group having 1 to 8 carbon atoms, and R 5 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and the polymer block (B) is a polymer block having a glass transition point or softening point of 50° C. or less and forms a flexible phase.