超临界CO_2对高粘熔体缩聚过程的增强作用研究进展  

Review of Enhancement Effect of Supercritical Carbon Dioxide on Melt Phase Polycondensation

作　　者：蒋春跃[1] 沈燕方[1] 潘勤敏 

机构地区：[1]浙江工业大学化工与材料科学学院,浙江杭州310014 [2]Department of Chemical Engineering,University of Waterloo,Waterloo,Ontario

出　　处：《高分子材料科学与工程》2007年第5期28-32,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20576123)

摘　　要：对超临界CO2环境中高粘熔体缩聚过程的研究现状与进展进行了综述,详细列举了聚酯、聚碳酸酯、及尼龙66为代表的超临界CO2高粘熔体/固相缩聚过程的研究方法与结果。在对近年来的研究状况和结果进行总结归纳后,认为超临界CO2对高粘熔体缩聚过程的增强作用机理可归结为:对过程热力学平衡推动力的增强和动力学传质速率的增强这两个方面。The new research advances in the technologies of melt phase polycondensation and swollen solid phase polycondensation due to the presence of supercritical COz were reviewed. The effects of supercritical CO2 on the melt phase polycondensation and the solid phase polycondensation with respect to the production of polyester, polycarbonate, and nylon-66 were discussed. Significant advantages of using supercritical CO2 in improving the polycondensation kinetic rates and/or increasing the molecular weight of the resultant products were demonstrated in the above mentioned systems . It is concluded that the mechanism via which supercritical CO2 can significantly improve the polycondensation processes is that the presence of supercritical CO2 enhances both of the thermodynamic equilibrium driving force and the dynamic mass transport rate.

关 键 词：超临界CO2 高粘熔体 缩聚反应 溶解度 质量传递 

分 类 号：TQ316.4[化学工程—高聚物工业]