中华医学超声杂志

应用化学 ›› 1984, Vol. 0 ›› Issue (3): 11-18.

• 研究论文 • 上一篇    下一篇

丁二烯的NdCl3·2Phen-HAl(i-Bu)2催化定向聚合

杨继华, 逄束芬, 孙涛, 李瑛, 欧阳均   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1984-01-04 修回日期:1984-02-28 出版日期:1984-09-10 发布日期:1984-09-10

STEREOSPECIFIC POLYMERIZATION OF BUTADIENE CATALYZED BY NdCl3·2Phen-HAl(i-Bu)2 SYSTEM

Yang Jihua, Pang Shufen, Sun Tao, Li Ying, Ouyang Jun   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1984-01-04 Revised:1984-02-28 Published:1984-09-10 Online:1984-09-10

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摘要： 本文报导了一种新的二元氯化稀土定向聚合催化剂,系由氯化钕邻菲罗啉络合物(NdCl3·2Phen)与氢化二异丁基铝(HAl(i-Eu)2)所组成。该体系可在较宽范围内改变聚丁二烯的分子量。本文研究了该体系作用下丁二烯聚合的一般规律,着重考察了影响产物分子量的主要因素,表明HAl(i-Bu)2是聚合过程中的主要链转移剂,HAl(i-Bu)2/单体比是控制产物分子量的关键变量,文内对邻菲罗啉络合分子在控制产物分子量过程中可能起的作用进行了讨论。

Abstract: A new binary rare earth chloride catalyst composed of NdCl3·2Phen(Phen=1, 10-phenanthroline)and HAl (i-Bu)2 for stereospecific polymerization of butadiene has beenpresented. In contrast to other type of rare earth chloride catalysts the present systemis characterized by its ability to control the molecular weight of the product and itsspecific mode of formation. The general rule of butadiene polymerization with the cata-lyst was studied. It was found that HAl(i-Bu)2 is mainly the chain transfer agent inthe reaction and the HAl(i-Bu)2/monomer ratio is a key parameter controlling themolecular weight of polybutadiene obtained.The possible role of the phen molecule inmolecular weight controlling has been discussed.

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