橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2009 Vol.32 No.6 P.476-479

 橡胶技术网

钛酸丁酯/负载钛体系催化异戊二烯聚合

王鹏　 邵华锋　 姚薇　 黄宝琛　

摘　要：以钛酸丁酯[Ti(C_4H_9O)_4] 和TiCl_4/MgCl2(简称Ti)为主催化剂、三异丁基铝(简称Al)为助催化剂催化异戊二烯 (Ip)聚合,考察了Ti(C4H9O)4和Al用量对聚合物在汽油中可溶性及单体转化率、催化效率(CE)的影响,并对聚合物进行了表征.结果表明,当Ti/Ip(摩尔比)一定时,聚合物在汽油中的溶解度随着Ti(C_4H_9O)_4/Ip(摩尔比)的增加而增大,Ti(C_4H_9O)_4/Ip为3×10~(-3)时,单体转化率达到最大值;当主催化剂配比及用量一定时,聚合物在汽油中的溶解度随着Al/Ti(C_4H_9O)_4(摩尔比)的增加先增大后减小,当 Al/Ti(C_4H_9O)_4为10～15时,单体转化率和CE存在最大值;该催化体系制得的聚异戊二烯以反式-1,4-结构为主,同时包含一定量的3,4-和1,2-结构.
关键词：负载钛;钛酸丁酯;三异丁基铝;异戊二烯;聚合;结构
分类号：TQ335 　文献标识码：A
文章编号：1000-1255(2009)06-0476-04

Polymerization of isoprene with tetrabutyl titanate and supported titanium catalyst system

Wang Peng（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Shao Huafeng（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Yao Wei（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Huang Baochen（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　

Abstract：Isoprene(Ip)was polymerized with tetrabutyl titanate,supported titanium catalyst (simplified as Ti) as main catalyst and triisobutylaluminium(simplified as Al) as promoter. The effects of tetrabutyl titanate and Al dosage on the solubility of polymer in gasoline, conversion and catalyst efficiency (CE) were investigated, and the structure of polymer was characterized. The results showed that when Ti/Ip (mole ratio)was fixed, with increasing Ti(C_4H_9O)_4/Ip(mole ratio), the gasoline dissolvable part in polymer increased, and the conversion of Ip reached the highest value when Ti (C_4H_9O)_4 /Ip was 3×10~(-3). When the main catalyst dosage was fixed, with increasing Al/Ti (C_4H_9O)_4(mole ratio),the gasoline dissolvable part in polymer increased at first and then decreased, and both conversion and CE reached the highest value at Al/Ti (C_4H_9O)_4 of 10-15. The structure of polyisoprene based on the title catalyst system was minaly trans-1, 4-units, and also contains some 3, 4-units and 1, 2-units.
Keywords：supported titanium catalyst; tetrabutyl titanate; triisobutylaluminium; isoprene;polymerization;structure 实验

基金项目：国家自然科学基金资助项目(20674042).
作者简介：王鹏(1984-),男,硕士研究生.已发表论文1篇.
作者单位：王鹏（青岛科技大学,橡塑材料与工程教育部重点实验室,山东,青岛266042）　
　　　　　邵华锋（青岛科技大学,橡塑材料与工程教育部重点实验室,山东,青岛266042）　
　　　　　姚薇（青岛科技大学,橡塑材料与工程教育部重点实验室,山东,青岛266042）　
　　　　　黄宝琛（青岛科技大学,橡塑材料与工程教育部重点实验室,山东,青岛266042）　

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收稿日期：2008年10月13日

修稿日期：2009年9月1日

出版日期：2009年11月15日