副教授 博士生导师 硕士生导师
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 化工学院
学科: 高分子材料. 高分子化学与物理. 功能材料化学与化工
办公地点: 西部校区化工实验楼A303
联系方式: 办公室电话:84986101,13610963135
电子邮箱: zhangchq@dlut.edu.cn
开通时间: ..
最后更新时间: ..
点击次数:
论文类型: 期刊论文
发表时间: 2014-04-15
发表刊物: JOURNAL OF APPLIED POLYMER SCIENCE
收录刊物: SCIE、EI、Scopus
卷号: 131
期号: 8
ISSN号: 0021-8995
关键字: catalysts; rubber; addition polymerization
摘要: The polymerization of isoprene was examined by using a novel binary catalyst system composed of neodymium chloride tributylphosphate (NdCl3 center dot 3TBP) and methylaluminoxane (MAO). The NdCl3 center dot 3TBP/MAO catalyst worked effectively in a low MAO level ([Al]/[Nd]=50) to afford polymers with high molecular weight (M-n approximate to 10(5)), narrow molecular weight distribution (M-w/M-n=1.4-1.6), and high cis-1,4 stereoregularity (> 96%). The catalytic activity increased with an increasing [Al]/[Nd] ratio from 30 to 100 and polymerization temperature from 0 to 50 degrees C, while the M-n of polymer decreased. The presence of free TBP resulted in low polymer yield. Polymerization solvent remarkably affected the polymerization behaviors; the polymerizations in aliphatic solvents (cyclohexane and hexane) gave polymer in higher yield than that in toluene. The M-w/M-n ratio of the producing polymer remained around 1.5 and the gel permeation chromatographic curve was always unimodal, indicating the presence of a single active site in the polymerization system. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40153.