Synthesis and Characterization of Amphiphific Block Copolymer Containing PVP and Poly（5-benzyloxytrimethylene carbonate）

摘要

Amphiphilic copolymer of 5-benzyloxytrimethylene carbonate (BTMC) with poly(vinyl pyrrolidone) (PVP) was successfully synthesized using immobilized porcine pancreas lipase(IPPL) or SnOct2 as catalyst. Hydroxyl terminated PVP, synthesized with 2-mercaptoethanol as achain transfer reagent, was employed as a macroinitiator. The resulting copolymers werecharacterized by GPC, H NMR and IR. Increasing the BTMC/PVP-OH feed ratio ([B]/[P]) 1resulted in the increase of Mn of corresponding copolymers and the decrease of Mw/Mn.Immobilized enzyme has comparable catalytic activity to SnOct2 for the copolymerization.