丁苯多嵌段共聚物反应挤出过程研究  

Reactive Extrusive Processes for the Synthesis of Styrene/Butene Multi-block Copolymer

作　　者：烟伟[1] 高世双[2] 郑安呐[2] 刘洪来[1] 

机构地区：[1]华东理工大学化学系 [2]华东理工大学材料科学与工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2004年第3期280-283,共4页Journal of East China University of Science and Technology

基　　金：国家自然科学基金资助项目(50290091;20025618;20236010);上海市教委资助项目

摘　　要：在SHL-Φ35型紧密啮合同向旋转双螺杆挤出反应器中,以丁基锂为引发剂,丁二烯和苯乙烯混合进料,合成了丁苯多嵌段共聚物。采用静态实验法对物料在两组螺杆结构中的填充度分布和螺杆径向粘均分子量分布进行计算,同时对螺杆几何结构与材料性能的关系以及单体在挤出反应器中的聚合过程进行了考察,提出了以丁基锂为引发剂、反应挤出合成丁苯多嵌段共聚物两段聚合过程机理。Styrene-butadiene multi-block copolymers were synthesized through polymerization by styrene and butadiene initiated by anionic butyl-lithium in a co-rotating close intermeshing twin-screw (extruder) of the SHL-Φ35. Both the fill factor distribution and the viscosity average molecular weight distribution of polymer for the screw structure were calculated by the static experimental method. The polymerization of the monomers in the extrusive processes and the relationships of the screw structure and the copolymers properties were also investigated at the same time. A result is obtained that the screw structure in the extrusive processes has a decisive influence on the product quality for sequential polymerization. This also provides a useful polymerization mechanism for synthesizing styrene-butadiene multi-block copolymers through reactive extrusive process with anionic butyl-lithium as initiating agent.

关 键 词：丁苯多嵌段共聚物 反应挤出 分子量分布 双螺杆挤出反应器 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]