Patent ID: 7786217

Claim:
A copolymer comprising (a) at least one polymer block comprising a plurality of constitutional units that correspond to at least one cationically polymerizable isomonoolefin species and (b) at least one polymer block comprising a plurality of constitutional units that correspond to at least one anionically polymerizable monomer species selected from the group consisting of monomers of formula (I): wherein R 1 , R 2 , R 3 and each occurance of R 4 are each independently selected from the group consisting of hydrogen, C 1 -C 20 alkyl, C 1 -C 20 alkyl substituted with C 1 -C 20 aryl, C 1 -C 20 aryl, halogen, C 1 -C 20 haloalkyl, hydroxyl, C 1 -C 20 alkoxy, amino, C 1 -C 20 alkylamino, di(C 1 -C 20 alkyl)amino, thiol, C 1 -C 20 alkylthio, carboxylate, C 1 -C 20 acyl, nitro, cyano, or at least two R groups are taken together to form a fused ring structure; n is an integer of 1 or 2; p is an integer of 0 or 1; M is a metal; X is a counterion; and L is one or more ancillary ligands; and (c) at least one functional group selected from allyl and silyl, wherein the functional group is located between at least one cationically polymerizable isomonoolefin species and at least one anionically polymerizable monomer species.