Poly(propylene carbonate) (PPC) with high molecular was synthesized by copolymerization of carbon dioxide (CO2) with propylene oxide (PO) using a supported muti-components zinc glutarate catalyst.The resulting polymers synthesized under different reaction conditions were characterized by 1H-NMR

GPC

DSC and TGA.The effects of reaction time and reaction pressure on the yields and the properties of the polymers were investigated.With reaction time increasing from 20 h to 40 h

the yield of polymer increased from 59.9 to 98.0 g polymer/g catalyst.However

reaction time had little influence on thermal and mechanical properties

as well as molecular weight of the polymers.With the reaction pressure decreasing from 5.2 to 2.6 MPa

the thermal and mechanical properties of the polymer decreased significantly.According to the GPC and NMR results

this phenomenon can be explained by the fact that the molecular weight of polymer decreased

and the content of polyether (PE) unit in the backbone and cycle propylene carbonate (CPC) increased with the reaction pressure decreasing.Polymer with high molecular weight of 237×103

a glass transition temperature of 38℃ and a tensile strength of 31.17 MPa was obtained at the optimal reaction conditions with 5.2 MPa

40 h.