高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (7): 1259.

• 研究简报 • 上一篇    下一篇

CpTiCl2(OR)/MAO体系催化苯乙烯间规聚合的研究

马海燕, 张越, 陈斌, 黄吉玲, 钱延龙   

  1. 华东理工大学金属有机化学研究室, 上海 200237
  • 收稿日期:2000-08-03 出版日期:2001-07-24 发布日期:2001-07-24
  • 通讯作者: 钱延龙(1940年出生),男,教授,博士生导师,主要从事金属有机与均相催化研究.E-mail:qianling@online.sh.cn E-mail:qianling@online.sh.cn
  • 基金资助:

    国家自然科学基金(批准号:29871010);国家自然科学基金与中国石化总公司联合基金(批准号:29734145)

Studies on Syndiospecific Polymerization of Styrene Catalyzed by CpTiCl2(OR)/MAO System

MA Hai-Yan, ZHANG Yue, CHEN Bin, HUANG Ji-Ling, QIAN Yan-Long    

  1. The Laboratory of Organomet allic Chemistry, East China University of Science and Technology, Shanghai 200237, China
  • Received:2000-08-03 Online:2001-07-24 Published:2001-07-24

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关键词: 茂金属催化剂, 苯乙烯, 间规聚合, 钛化合物

Abstract: Five new alkoxyl substituted half sandwich complexes CpTiCl2(OR), R=methoxylethyl(1), methoxylpropyl(2), methoxylisopropyl(3), o methoxylphenyl(4), tetrahydrofurfuryl(5), were synthesized, characterized and tested as catalyst precursors for the syndiospecific polymerization of styrene. When activated with methylaluminoxane(MAO), the new precursors 1-5 exhibited high catalytic activity for the syndiospecific polymerization of styrene and were more active than CpTiCl3. The differentstructures of alkoxyl ligands affected the activity slightly. When the polymerization was carried in bulk, all the five precursors exhibited high catalytic activity even at low ratio of c (Al)/ c (Ti)=300, the s PS% of the polymer produced by alkoxyl substituted complexes was much higher than that of CpTiCl3. The polymerization temperature of 70 ℃ was more suitable for this kind of complexes. The existence of the additional oxygen atom in the alkoxyl ligands stabilized the active species at the higher temperature.

Key words: Met allocene catalyst, Styrene, Syndiospecific polymerization, Titanium

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