| abstract |
(57) [Summary] (Modified) [PROBLEMS] To provide a polymer electrolyte membrane having both high proton conductivity and methanol blocking property when used in a solid fuel cell, a method for producing the same, and a solid fuel cell. A polymer electrolyte membrane containing a composite polymer having a repeating unit represented by general formulas (1) and (2) in a perfluorosulfonic acid polymer membrane. Fuel cell using this [Where X represents>NH,> S, -CH = CH-. Y represents -NH-, -O-, -CH = CH-, or may not be introduced. Z represents H or a C1-8 branched or divalent hydrocarbon group which may form a ring. R represents H, an alkyl group, or an alkoxy group, and m represents an integer selected from 0 to 4. R may form a ring. r is 1 to 15, p and q are each 0 -20, 1-10. s can be set arbitrarily. ] |