Synthesis And Characterization Of Amphiphilic Block Copolymer Containing Pvp And Poly(5-Benzyloxytrimethylene Carbonate)

Amphiphilic copolymer of 5-benzyloxytrimethylene carbonate (BTMC) with poly (vinyl pyrrolidone) (PVP) was successfully synthesized using immobilized porcine pancreas lipase (IPPL) or SnOct(2) as catalyst. Hydroxyl terminated PVP, synthesized with 2-mercaptoethanol as a chain transfer reagent, was employed as a macroinitiator. The resulting copolymers were characterized by GPC, H-1 NMR and IR. Increasing the BTMC/PVP-OH feed ratio ([B]/[P]) resulted in the increase of M-n of corresponding copolymers and the decrease of M-w/M-n. Immobilized enzyme has comparable catalytic activity to SnOCt(2) for the copolymerization.