Patent ID: 8415070

Claim:
A polymer, comprising one or more of the repeat units (IA), (IB) or (IC): wherein R comprises a linear or branched perfluoroalkylene group of 1 to 20 carbon atoms, optionally containing oxygen or chlorine; Q is chosen from F, —OM, —NH 2 , —NHCN, —N(M)SO 2 R 2 , —N(CN)SO 2 R 2 , —C(M)(CN) 2 , —C(M)(CN)(SO 2 R 2 ) and —C(M)(SO 2 R 2 ) 2 ; R 2 is an optionally fluorinated 1 to 14 carbon alkyl group, optionally containing ether oxygen linkages, or an optionally fluorinated 6-12 carbon aryl group; and M is independently H, an alkali cation, ammonium or substituted ammonium.