Synthesis and characterization of biodegradable amphiphilic PEG-grafted poly(DTC-co-CL)
作者:Qiu Jin Zhang、Wei Pu Zhu、Zhi Quan Shen
DOI:10.1016/j.cclet.2010.04.032
日期:2010.10
A novel biodegradable copolymer, poly(5,5-dibromomethyltrimethylene carbonate-co-epsilon-caprolactone) (poly(DBTC-co-CL)) with pendant bromine groups, was synthesized via ring-opening polymerization (ROP) of epsilon-caprolactone (CL) and 5,5-dibromomethyltrimethylene carbonate (DBTC) using stannous octoate (Sn(Oct)(2)) as catalyst. Then the pendant bromine groups were completely converted into azide form, which permitted "click" reaction with alkyne-terminated polyethylene (A-PEG) by Huisgen 1,3-dipolar cycloadditions preparing biodegradable amphiphilic poly(DTC-co-CL)-g-PEG graft copolymer. The graft copolymer was characterized by nuclear magnetic resonance (NMR) and size-exclusion chromatography (SEC). (C) 2010 Wei Pu Zhu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.