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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°.
Novel, fully degradable brush polymers with polycarbonate backbones and polylactide side chains were prepared by a three-step reaction that included the polypolymerization 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, while the copolymers with (L) -PLA side chains extracted 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 °.