应用化学

• 研究论文 •    下一篇

多核钕-铝双金属配合物催化丁二烯聚合V.甲基铝氧烷的影响

董为民, 杨继华, 单成基, 逄束芬, 黄葆同   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1997-11-21 修回日期:1998-04-20 出版日期:1998-08-10 发布日期:1998-08-10
  • 基金资助:
    国家自然科学基金

Butadiene Polymerization Catalyzed by Polynuclear Nd-Al Bimetallic Complex V. Effect of Methylaluminoxane

Dong Weimin, Yang Jihua, Shan Chengji, Pang Shufen, Huang Baotong   

  1. Changchun Institute of APPlied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-11-21 Revised:1998-04-20 Published:1998-08-10 Online:1998-08-10

摘要: 以外添加的方式,考查了甲基铝氧烷(MAO)对多核钕-铝双金属配合物催化了二烯聚合的影响,并与烷基铝存在下的作用结果相比较.结果表明,MAO用量较低时(n(Al)/n(Nd)在5~20之间),即可较烷基铝更大程度提高稀土配合物的催化活性,获得顺式聚了二烯;MAO的链转移作用较烷基铝的低.

关键词: 丁二烯, 定向聚合, 钕-铝双金属配合物, 甲基铝氧烷

Abstract: The effect of methylaluminoxane(MAO) on butadiene polymerization catalyzed bypolynuclear Nd-Al bimetallic complex has been examined.Compared with alkylaluminiumMAO could improve the activity of the catalyst system to a higher extent even at n(Al)/n(Nd) 5~20 mol/mol.The chain transfer seems to be lower by using MAO than that by using alkylaluminium.

Key words: butadiene, stereospecific polymerization, Nd-Al bimetallic complex, methylaluminoxane