CROSSLINKABLE SULFONATED COPOLYMER AND METHOD FOR PRODUCING THE SAME, CURABLE PRODUCT OF CROSSLINKABLE SULFONATED COPOLYMER AND METHOD FOR PRODUCING THE SAME, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND FUEL CELL

摘要

PPROBLEM TO BE SOLVED: To provide a crosslinkable sulfonated copolymer excellent in ionic conductance, remarkably reducing methanol crossover and to provide a fuel cell including crosslinked product of the copolymer. PSOLUTION: The sulfonated copolymer comprising (a) at least one aromatic ether repeating unit and (b) an aromatic ether repeating unit comprising a sulfonic acid group or a sulfonate group and having a polymerizable unsaturated functional group at one end or both ends thereof, and can remarkably reduce methanol crossover, maintaining superior dimensional stability and ionic conductivity by reducing swelling. PCOPYRIGHT: (C)2007,JPO&INPIT