苯乙烯聚合反应挤出过程中停留时间及其分布  

Residence Time and Its Distribution During the Reactive Extrusion Processing for the Bulk Polymerization of Styrene

作　　者：张鹰[1] 司林旭[1] 郑安呐[1] 朱中南[2] 

机构地区：[1]华东理工大学材料工程学院反应挤出研究室,上海200237 [2]华东理工大学联合反应工程研究所

出　　处：《华东理工大学学报（自然科学版）》2002年第5期506-510,共5页Journal of East China University of Science and Technology

基　　金：国家自然科学基金项目 (2 99740 0 8)

摘　　要：研究了苯乙烯单体在双螺杆挤出机中聚合反应的停留时间及其分布。结果表明 ,聚合过程中单体及其聚合物在双螺杆中的停留时间分布于 1 min～ 4min范围内 ,平均停留时间在较大程度上受螺杆的转速、进料速度、聚合物平均分子量等因素的影响。聚合反应主要发生在螺杆的60 0 mm处 ,约于 85 0 mm处聚合反应完成。根据因次分析得到了平均停留时间的模型 ,实验表明该模型与实测结果吻合。The residence time and its distribution during the bulk p olymerization of styrene in a twin screw extruder were investigated. It is found that the residence time of the reagents in the twin screw extruder covers t he r ange from 1 min to 4 min. Furthermore, the residence time is grea tly affected by the rotation speed, the feed speed and average molecular weight of the polymer. It is also found that the polymerization mainly generates at the zone on the screw about 60 cm length from initial position and fully completes at th at about 85 cm length. Based on dimensional analysis, a model o f the residence time has been established, which is confirmed by the results of realistic measurements.

关 键 词：苯乙烯 聚合反应 挤出过程 停留时间 双螺杆挤出机 示踪剂 时间分布 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ320.663