SYNTHESIS AND CHARACTERIZATION OF HIGH MOLECULAR WEIGHT POLY(1,2-PROPYLENE CARBONATE-co-1,2-CYCLOHEXYLENE CARBONATE) USING ZINC COMPLEX CATALYST  

作　　者：肖敏 孟跃中 

机构地区：[1]The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-Sen University

出　　处：《Chinese Journal of Polymer Science》2011年第5期552-559,共8页高分子科学（英文版）

基　　金：financially supported by the China High-Tech Development 863 Key Program(No.2010AA0349);Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(2010);Guangdong Province Sci.&Tech.Bureau(Key Strategic Project Grant No.2008A080800024);Guangdong Education Bureau(Key Project) and Chinese Universities Basic Research Founding

摘　　要：Using supported multi-componem zinc dicarboxylate catalyst, poly（1,2-propylene carbonate-co-1,2-cyclohexylene carbonate） （PPCHC） was successfully synthesized from carbon dioxide （CO2） with propylene oxide （PO） and cyclohexene oxide （CHO）. The conversion of epoxides dramatically increased up to 89.7% （yield： 384.2 g of polymer per g of Zn） with increasing reaction temperature from 60℃ to 80℃. The optimized reaction temperature is 80℃. The chemical structure, the molecular weight, as well as thermal and mechanical properties of the resulting terpolymers were investigated extensively. When CHO feed content （mol%） is lower than 10%, the PPCHC terpolymers have number average molecular weight （Ma） ranging from 102 × 10^3 to 202 × 10^3 and molecular weight distribution （MWD） values ranging from 2.8 to 3.5. In contrast to poly（propylene carbonate） （PPC）, the introduction of small amount of CHO leads to increase in the glass transition temperature from 38.0℃ to 42.6℃. Similarly, the mechanical strength of the synthesized terpolymer is greatly enhanced due to the incorporation of CHO. These improvements in mechanical and thermal properties are of importance for the practical application of PPC.Using supported multi-componem zinc dicarboxylate catalyst, poly（1,2-propylene carbonate-co-1,2-cyclohexylene carbonate） （PPCHC） was successfully synthesized from carbon dioxide （CO2） with propylene oxide （PO） and cyclohexene oxide （CHO）. The conversion of epoxides dramatically increased up to 89.7% （yield： 384.2 g of polymer per g of Zn） with increasing reaction temperature from 60℃ to 80℃. The optimized reaction temperature is 80℃. The chemical structure, the molecular weight, as well as thermal and mechanical properties of the resulting terpolymers were investigated extensively. When CHO feed content （mol%） is lower than 10%, the PPCHC terpolymers have number average molecular weight （Ma） ranging from 102 × 10^3 to 202 × 10^3 and molecular weight distribution （MWD） values ranging from 2.8 to 3.5. In contrast to poly（propylene carbonate） （PPC）, the introduction of small amount of CHO leads to increase in the glass transition temperature from 38.0℃ to 42.6℃. Similarly, the mechanical strength of the synthesized terpolymer is greatly enhanced due to the incorporation of CHO. These improvements in mechanical and thermal properties are of importance for the practical application of PPC.

关 键 词：Carbon dioxide Cyclohexene oxide CATALYSIS TERPOLYMERIZATION Propylene oxide. 

分 类 号：O631.5[理学—高分子化学]