Patent ID: 7871736

Claim:
A polymer electrolyte membrane for a fuel cell, comprising a polymer of Formula 1: wherein R 1 to R 3 are the same or different, and are fluorine, hydrogen, or a substituted or unsubstituted alkyl group, and at least one of R 1 to R 3 is fluorine or an alkyl group substituted with fluorine; R 4 to R 6 are independently —O—, —S—, —CO—, —SO 2 —, or —P(Ph)O where Ph is phenyl-; R 7 to R 10 are independently hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted heteroalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; R 11 is —O—, —S—, —CO—, or —SO 2 —; l and m are independently an integer ranging from 0 to 24; w is an integer ranging from 1 to 20; k is an integer ranging from 1 to 1000; x is an integer ranging from 100 to 100,000; y is an integer ranging from 1 to 100,000; z is an integer ranging from 1 to 10,000; and Y is a proton conductive group.