以钴锌双金属氰化络合物(Co-Zn DMC)为催化剂,高催化效率地合成了CO_2/StO二元共聚物,以及CO_2/StO/CHO三元共聚物,并对催化剂和聚合产物用元素分析、红外光谱(IR)、核磁共振(~1H-NMR)等进行表征.二元共聚催化效率高达3600 g Polym/g Cat,碳酸酯键含量达94.5%,(M)_n=13000 g/mol,分子量分布PDI=1.29;三元共聚催化效率为890 g Pblym/g Cat,碳酸酯键含量为92.6%,(M)_n=16700 g/mol,PDI=1.61.通过热重分析(TG)和差示扫描量热分析(DSC)研究了聚合产物的热性能,三元共聚物的T_g较聚碳酸苯亚乙酯提高了10℃左右,其碳酸酯键热分解温度都比相应的二元共聚物有所降低.
A Co-Zn double metal cyanide complex(Co-Zn DMC)Was prepared and characterized by elemental analysis and IR. It was an active catalyst for the copolymerizaion of carbon dioxide and styrene oxide(StO),showing catalytic efficiency as high as 3600 g polym/g Cat,which never reported elsewhere.The resulted copolymer,which number-average moleculer weight((M)_n) Was 13000 g/mol and polydispersity index(PDI)was 1.29,were proved to have 94.5%carbonate content by ~1H-NMR.In the terpolymerization of carbon dioxide,styrene oxide(StO)and cyclohexene oxide(CHO),catalytic efficiency Was 890 g Polym/g Cat while terpolymer's carbonate content was 92.6%,(M)_n=16700 g/mol and PDI=1.61.Thermal properties of polymers were studied by thermogravimetry analysis(TG)and differential scanning calorimetry(DSC)measurement.The terpolymer have a higher glass transition temperature(T_g)but a lower decomposition temperature compared to the copolymer.
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