A novel synthetic method for well-defined polymers containing benzotriazole and diazobenzene chromophores

摘要

PBHEMA was prepared by RAFT polymerization in the presence of CPDN and AIBN. Diazobenzene groups were introduced into the sidechains by post-azo-functionalization. The resulting polymers containing benzotriazol and azobenzene groups exhibited higher molecular weight than original polymers, narrow MWD (M-W/M-n=1.17-1.26) degrees of functionality. Thermal stabilities and glass transition temperatures of the polymers increased with the introduction of diazo chromophores. The molecular weight of the polymer had a slight effect on the T-g of the polymer. The polymer showed partial crystallization as the diazo content increased above 36%. [GRAPHICS]