Patent ID: 7838594

Claim:
A polymer comprising repeating units of Formula (I): wherein Ar is a divalent group of Formula (II): and is optionally substituted with one or more fluorine; R f is a straight chain, branched or cyclic, perfluorinated alkylene group having from 1 to 20 carbon atoms and optionally substituted with one or more ether oxygens or halogens; m is 1-6; p is the number of monomeric units; M is one or more of monovalent cation; and Q is S, SO 2 , CO, or CR 1 R 2 , wherein R 1 and R 2 are independently branched or cyclic perfluorinated alkyl groups having 1 to 10 carbon atoms, and wherein R 1 and R 2 can together form a ring.