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°.
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
作者简介
Corresponding author （email： xblu@dlut.edu.cn）
