A method of making an ion conducting membrane includes a step of reacting a compound having formula 1 with a polymer having polymer segment 2: to form a copolymer having polymer segment 2 and polymer segment 3: and The copolymer having polymer segment 2 and polymer segment 3 are then formed into an ion conducting membrane, wherein Z is a C6-80 aliphatic, polyether, or perfluoropolyether; Y is a divalent linking group; E0 is a hydrocarbon-containing moiety; Q1 is a perfluorocyclobutyl moiety; P1, P2 are each independently absent, —O—, —S—, —SO—, —CO—, —SO2—, —NH—, NR2—, or —R3—; R2 is C1-25 alkyl, C1-25 aryl or C1-25 arylene; and R3 is C1-25 alkylene, C1-25 perfluoroalkylene, perfluoroalkyl ether, alkylether, or C1-25 arylene.