氢气调节下负载钛体系催化合成高反式丁二烯-异戊二烯共聚橡胶  

Synthesis of high trans-1,4-butadiene-isoprene copolymers with supported titanium catalysts under hydrogen regulation

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3期186-189,共4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：以TiCl4/MgCl2-Al(i-Bu)3为催化体系制得高反式丁二烯-异戊二烯共聚橡胶(TBIR),研究了氢气调节下体系的聚合速率和催化效率,考察了氢气调节下不同转化率对TBIR微观结构和平均组成的影响,并寻求一种利用傅里叶变换红外光谱(FTIR)计算共聚物平均组成的简便方法。结果表明,氢气的加入明显降低了聚合速率和催化效率,且反应初期聚合速率增幅趋缓;转化率对TBIR微观结构影响不大,聚丁二烯链节的反式-1,4-结构摩尔分数均大于95.0%,聚异戊二烯链节的反式-1,4-结构摩尔分数均大于98.0%;随着转化率的提高,TBIR的平均组成降低;利用FTIR法计算共聚物的平均组成具有准确性和可靠性。The high trans-1,4-butadiene-isoprene copolymers（TBIR） was synthesized with TiCl4/MgCl2-Al（i-Bu）3 as catalyst system,polymerization rate and catalytic efficiency under hydrogen regulation were studied,effects of conversion on microstructure and average composition of the copolymer were investigated,and a convenient method for calculating way of average composition of the copolymer using Fourier transform infrared spectroscopy（FTIR） was proposed.The results showed that polymerization rate and catalytic efficiency decreased with adding hydrogen,the increment of polymerization rate decreased at the beginning.The conversion had little effect on the microstructure of TBIR.The mole fraction of trans-1,4-polybutadiene unit was above 95.0%,and the mole fraction of trans-1,4-polyisoprene unit was above 98.0%.The average composition of the copolymer decreased with increasing the conversion.The FTIR calculating method was accurate and reliable.

关 键 词：负载钛催化剂 丁二烯 异戊二烯 共聚 转化率 微观结构 

分 类 号：TQ333[化学工程—橡胶工业]