连续ATRP法合成两亲性聚苯乙烯-b-聚甲基丙烯酸嵌段共聚物

Amphiphilic diblock copolymer polystyrene block poly(methacrylate acid), PS-b-PMAA, was synthesized via consecutive atom transfer radical polymerizations (ATRPs). Firstly, the macroinitiators PS-Cl with different molecular weights and narrow molecular weight distributions were synthesized via ATRP of styrene (St), using ethyl 2-bromoisobutyrate (EBiB) as an initiator, CuCl as a catalyst and N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA) as a ligand. Secondly, the diblock copolymer PS-b-PMMA with different molecular weights and narrow molecular weight distributions were obtained via a consecutive ATRP of methyl methacrylate (MMA), using the PS-Cls as the macroinitiators. Lastly, the amphiphilic diblock copolymer PS-b-PMAA was obtained by hydrolysis and acidification of the diblock copolymer PS-b-PMMA. In this work, the kinetics of block copolymerization of MMA was investigated using PS-Cl as the macroinitiators, and GPC and 1H NMR were used to character the (co)polymers.