Patent ID: 8044146

Claim:
A polymer having formula 1: wherein: Z 1 , Z 2 , and Z 3 are each independently —SO 2 X, —PO 3 H 2 , or —COX; d is the number of Z 2 attached to E 1 ; f is the number of Z 3 attached to E 2 ; E 1 and E 2 are each independently an aromatic-containing moiety; A is absent or O or a chain extender having a carbon backbone; X is an —OH, a halogen, an ester, or P 1 , P 2 , P 3 , P 4 are each independently absent, —O—, —S—, —SO—, —SO 2 —, —CO—, —NH—, NR 2 —, or —R 3 —; R 2 is C 1-25 alkyl, C 1-25 aryl, or C 1-25 arylene; R 3 is C 1-25 alkylene, C 1-25 perfluoroalkylene, or C 1-25 arylene; R 4 is trifluoromethyl, C 1-25 alkyl, C 1-25 perfluoroalkylene, C 1-25 aryl, or another E 1 group; i and j are each independently an integer from 1 to 10,000; and Q 1 and Q 2 are each independently a fluorinated cyclobutyl moiety.