| 초록 |
Poly(aryl ether ketone sulfone)s copolymers containing pendant disodium disulfonate groups were prepared by direct copolymerization of 3,3'-disulfonate-4,4'-difluorodiphenyl sulfone , 4,4'-diflorobezophenone and aromatic diol at 190oC in NMP containing anhydrous potassium carbonate. The ratio of sulfonated dihalide to unsulfonated dihalide was controlled to produced a series of copolymers from 0% to 60% disulfonation. The copolymers were characterized for molecular weight, chemical composition, thermal stability, conductivity and methanol permeation via solution casting from NMP. These materials are of interest as new polymeric electrolyte proton exchange membranes. |
