高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (3): 493.

• 研究简报 • 上一篇    

钕-铝双金属配合物催化异戊二烯聚合的原位环化反应

董为民, 杨继华, 逄束芬   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1999-02-19 出版日期:2000-03-24 发布日期:2000-03-24
  • 通讯作者: 董为民(1969年生),男,博士,助理研究员,主要从事稀土催化双烯烃定向聚合及聚双烯烃环化改性的研究.
  • 基金资助:

    国家自然科学基金(批准号:29574179)资助

Cyclization in situ of Isoprene Polymerization Catalyzed by Nd-Al Bimetallic Complex

DONG Wei-Min, YANG Ji-Hua, PANG Shu-Fen   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022, China
  • Received:1999-02-19 Online:2000-03-24 Published:2000-03-24

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被引次数

1

关键词: 钕-铝双金属配合物, 环化反应, 环化聚异戊二烯, 环聚反应, 阳离子活性种

Abstract: Function of chloride and effect of various alkylaluminiums, Cl/Al molar ratio, solvents on cyclization in situ of isoprene polymerization catalyzed by Nd Al bimetallic complex were studied. The structure of cyclized products was characterized by means of IRand 1H NMR. The results indicated that in the course of isoprene polymerization with rare earth catalytic system, the function of alkylchloride introduced is terminating cis polymerization and generating cationic species with alkyl-aluminums to initiate cyclization in situ . Soluble cyclized polyisoprene was obtained with fragments of cyclopolyisoprene.

Key words: Nd-Al bimetallic complex, Cyclization, Cyclized polyisoprene, Cyclopolymerization, Cationic species

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