| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a sulfonate group-containing segmented block copolymer not only expressing more excellent proton conductivity than that of conventional polymers but being excellent in stability under high temperature and moisture and provide a composition, a molded product, a proton exchange membrane for fuel cells and a fuel cell. <P>SOLUTION: The block copolymer comprises one or more first segment and one or more second segment in the molecule, wherein the first segment mainly comprises a structure expressed by chemical formula 1 (wherein X expresses H or a monovalent cation; Y expresses a sulfonyl group or a carbonyl group; Ar<SP>1</SP>expresses a divalent aromatic group; n expresses 3-50 integer) and the second segment mainly comprises a structure expressed by chemical formula 2 (wherein Ar<SP>2</SP>expresses a divalent aromatic group having an electron-attracting group; m expresses 3-50 integer). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
