双组分钛基催化剂合成反式-1,4-聚异戊二烯/3,4-聚异戊二烯复合胶  

Synthesis of trans-1,4-polyisoprene/3,4-polyisoprene compounded rubber with two-component titanium-based catalysts

作　　者：徐召来[1] 邵华锋[1] 姚薇[1] 黄宝琛[1] 

机构地区：[1]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

出　　处：《合成橡胶工业》2010年第6期418-423,共6页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(20674042)

摘　　要：以钛酸正戊酯[Ti(C5H11O)4]-TiCl4/MgCl2(简称Ti)-Al(Et)3(简称Al)组成的双组分钛基催化剂引发异戊二烯(Ip)聚合,原位合成反式-1,4-聚异戊二烯(TPI)/3,4-聚异戊二烯(PIp)复合胶,考察了聚合活性和复合胶在汽油中可溶性的影响因素,表征了复合胶的微观结构,并研究了复合胶的特性黏数。结果表明,在Ti/Ip(摩尔比)为6×10-5、Ti(C5H11O)4/Ip(摩尔比)为1.2×10-3、Al/Ti(C5H11O)4(摩尔比)为10的条件下,聚合活性最优;复合胶的汽油可溶物部分含量变化的趋势遵循以下规律:随着Ti(C5H11O)4用量的增加而增大;随着Al/Ti(C5H11O)4的增大先升高后降低最后趋于平稳;随着Ti/Ip的增大而逐渐降低。TPI的相对分子质量大于3,4-PIp。The trans-1,4-polyisoprene/3,4-polyisoprene compounded rubber was synthesized by in situ polymerization of isoprene（Ip） with two-component titanium-based catalysts of Ti（C5H11O）4-TiCl4/MgCl2（simplified as Ti）-Al（Et）3（simplifed as Al） the influencing factors of the polymerization activity and solubility of compounded rubber in gasoline were investigated,and the microstructure and intrinsic viscosity number were studied.The results showed that polymerization activity was the highest when polymerization conditions was Ti/Ip（mole ratio） 6×10-5,Ti（C5H11O）4/Ip（mole ratio） 1.2×10-3,Al/Ti（C5H11O）4（mole ratio）10.When increasing Ti（C5H11O）4,the content of gasoline-soluble part in compounded rubber increased.When increasing Al/Ti（C5H11O）4,it first increased and then decreased and trended towards stability at last,while increasing Ti/Ip,it decreased.The relative molecular mass of TPI was bigger than that of 3,4-PIp.

关 键 词：钛酸正戊酯 负载钛催化剂 三乙基铝 异戊二烯 原位聚合 反式-1 4-聚异戊二烯 3 4-聚异戊二烯 复合胶 

分 类 号：TQ333.3[化学工程—橡胶工业]