反式丁二烯-异戊二烯共聚物相对分子质量及其分布的调节  

Control of relative molecular mass and its distribution of trans-1,4-butadiene-isoprene copolymers

作　　者：杜凯[1,2] 姚薇[1] 郭常青[3] 贺爱华[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 [2]中国石化北京化工研究院精细所,北京100013 [3]海洋化工研究院,山东青岛266071

出　　处：《合成橡胶工业》2011年第1期29-33,共5页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(20174021);青岛市科委科学基金资助项目(02-2-kj-yj-30)

摘　　要：采用负载钛催化剂经溶液聚合法合成了反式-1,4-丁二烯-异戊二烯共聚橡胶（TBIR）,研究了聚合条件、氢气调节及塑炼对TBIR相对分子质量及其分布的影响。特性黏数和门尼黏度的测试结果表明,聚合条件对TBIR的相对分子质量略有影响;氢气分压对TBIR相对分子质量的影响较明显,其在0.01~0.06 MPa内变化可使TBIR的门尼黏度在20~70、特性黏数在1.3~3.5 dL/g内调节。凝胶渗透色谱测试结果表明,一次性加入氢气所合成TBIR的分子量分布呈多峰结构;连续加入氢气时呈单峰结构,多分散指数为3.04。trans-1,4-butadiene-isoprene copolymer（TBIR） was synthesized by supported titanium catalyst TiCl4/MgCl2-Al（i-Bu）3.The influences of polymerization conditions,hydrogen gas and mastication process on relative molecular mass and its distribution of TBIR were investigated.The results of intrinsic viscosity and Mooney viscosity indicated that the polymerization condition had slight effects on the relative molecular mass of TBIR,but hydrogen gas pressure evident.The ML（1＋4）100 ℃ and intrinsic viscosity of TBIR could be controlled in the range of 20-70 and 1.3-3.5 dL/g respectively by changing the hydrogen gas pressure from 0.01 MPa to 0.06 MPa.Gel permeation chromatography analysis showed a multimodal distribution of the relative molecular mass when hydrogen gas was added by one time,but unmodal distribution for the addition of hydrogen gas by more than one time,and the value of polydispersity index was 3.04.

关 键 词：丁二烯 异戊二烯 反式-1 4-共聚橡胶 相对分子质量及其分布 氢气 

分 类 号：TQ330.1[化学工程—橡胶工业]