| abstract |
A polymer electrolyte membrane obtained by shaping and then crosslinking a composition containing: a block copolymer (Z); a compound (X) having two or more aromatic rings including one or more hydrogen atoms substituted with a hydroxyl group in the molecule; and a compound (Y) represented by general formula (1), the block copolymer (Z) including a polymer block (A) comprising a structural unit derived from an aromatic vinyl compound and having an ion-conducting group and an amorphous polymer block (B) comprising a structural unit derived from an unsaturated resin hydrocarbon and not having an ion-conducting group. (In the formula, R 1 represents a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a carboxyl group, each of R 2 and R 3 independently represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a carboxyl group. ) |