SULFONATED POLY(ARYLENE ETHER), METHOD OF MANUFACTURING THE SAME, AND CROSSLINKED POLYMER ELECTROLYTE MEMBRANE USING THE SAME

摘要

A crosslinked sulfonated polyCarylene ether) copolymer, a method of preparing the same and a polymer electrolyte membrane using the same are provided. The sulfonated polyCarylene ether) copolymer is synthesized by polycondensation of a dihalide monomer and a dihydroxy monomer having a sulfonate group or a dihydroxy monomer and a dihalide monomer having a sulfonate group. In addition, polymers are crosslinked by polycondensation between crossl inkable monohydroxy monomers. Thus, the copolymer and membrane have thermal stability, mechanical stability, chemical stability and film- forming capacity equal to or higher than a conventional sulfonated ?oly(arylene ether) copolymer or a commercially available polymer electrolyte membrane, i.e., a nafion film, and also have further improved proton conductivity and cell performance. Moreover, the polymer electrolyte membrane does not have any change in characteristics even though it is exposed to moisture for a long time.