利用SalenCrⅢCl催化二氧化碳（CO2）与环氧丙烷（PO）共聚反应,合成出新型脂肪族聚碳酸丙烯酯,利用红外光谱仪（IR）、氢核磁共振（1H-NMR）和凝胶渗透色谱仪（GPC）对该产物进行了表征。结果表明,最优化的实验条件为：反应温度40℃,CO2的压力1.5MPa,SalenCrⅢCl与DMAP的物质的量比为1∶2,反应20 h可获得完全交替的聚碳酸丙烯酯,分子量高达63 kg/mol。
The copolymerization of carbon dioxide（CO2） and propylene oxide（PO） was performed,by using SalenCrⅢCl with 4-（dimethylamino） pyridine（DMAP） as the cocatalyst,to produce poly（propylene carbonate）（PPC）.The copolymers were characterized by 1H nuclear magnetic resonance spectrum（1H-NMR） and Fourier transform infrared spectrum（FT-IR）.The results show that the optimization conditions of CO2/PO copolymerization should be generated at 1.5 MPa of CO2, 40 ℃ and n（SalenCrⅢCl）∶n（DMAP）=1∶2,Copolymerization.An alternating PPC with 63 kg/mol high molecular weight was obtained for 20 h Copolymerization.
参考文献
| [1] | 牛永盛,张万喜,庞烜,陈学思,姚卫国.二氧化碳与环氧化物交替共聚催化剂的最新研究[J].高分子材料科学与工程,2008(09):6-9. |
| [2] | Claire T.Cohen;Tony Chu;Geoffrey W.Coates .Cobalt Catalysts for the Alternating Copolymerization of Propylene Oxide and Carbon Dioxide:Combining High Activity and Selectivity[J].Journal of the American Chemical Society,2005(31):10869-10878. |
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