Fully degradable brush polymers with polycarbonate backbones and polylactide side chains  

作　　者：Jie Liu Weimin Ren Xiaobing Lu 

机构地区：[1]State Key Laboratory of Fine Chemicals, Dalian University of Technology

出　　处：《Science China Chemistry》2015年第6期999-1004,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21134002 and 21104007);the Program for Changjiang Scholars and Innovative Research Teams in Universities(IRT13008);Xiao Bing Lu gratefully acknowledges the Chang Jiang Scholars Program(T2011056)of the Ministry of Education of China

摘　　要：Novel, fully degradable brush polymers with polycarbonate backbones and polylactide side chains were prepared by a three-step reaction that included the terpolymerization of cyclohexene oxide （CHO） and benzyl glycidyl ether （BGE） with CO2, hydrogenation of the resultant terpolymers to afford the terpolymers with 1,2-glycerol carbonate units and the 1,8-diazabicyclo[5.4.0]undec-7-ene （DBU） mediated ring-opening polymerization of lactide on the polycarbonate backbone. The brush copolymer bearing polylactide （PLA） chains from racemic lactide （rac-LA） has a single glass-transition temperature of 58.5 ℃, whereas the copolymers with （L）-PLA side chains exhibited a melting enthalpy at 135.8 ℃ with AHm=25.04 J/g and were further shown by a WAXD study to be a typical semicrystalline polymer with sharp diffraction peaks at 20 values of 16.7° and 18.9°.Novel, fully degradable brush polymers with polycarbonate backbones and polylactide side chains were prepared by a three-step reaction that included the terpolymerization of cyclohexene oxide(CHO) and benzyl glycidyl ether(BGE) with CO2, hydrogenation of the resultant terpolymers to afford the terpolymers with 1,2-glycerol carbonate units and the 1,8-diazabicyclo[5.4.0]undec-7-ene(DBU) mediated ring-opening polymerization of lactide on the polycarbonate backbone. The brush copolymer bearing polylactide(PLA) chains from racemic lactide(rac-LA) has a single glass-transition temperature of 58.5 °C, whereas the copolymers with(L)-PLA side chains exhibited a melting enthalpy at 135.8 °C with ?Hm=25.04 J/g and were further shown by a WAXD study to be a typical semicrystalline polymer with sharp diffraction peaks at 2θ values of 16.7° and 18.9°.

关 键 词：carbon dioxide POLYCARBONATE TERPOLYMERIZATION brush polymer DEGRADABILITY 

分 类 号：O633.14[理学—高分子化学]