Patent ID: 7939216

Claim:
A polymer electrolyte membrane for fuel cell comprising a cross-linking reaction product between a hydrophilic polymer and a cross-linking agent represented by Formula 1 below, wherein the hydrophilic polymer comprises at least one material selected from the group consisting of poly (vinyl alcohol), poly (acrylamide), sulfonated polyaryletherketone, sulfonated polyphenyleneoxide, sulfonated polyether sulfone, sulfonated polyetherimide, polybenzimidazole, and polyimidazole, and the amount of the cross-linking agent is in the range of 0.01 to 0.5 mol based on 1 mol of the hydrophilic polymer repeating unit, wherein R 1 is a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C20 aryl group, or a substituted or unsubstituted C2-C20 heteroaryl group; and n is an integer in the range of 1 to 5.