应用化学 ›› 1997, Vol. 0 ›› Issue (5): 115-116.

• 研究论文 • 上一篇    

稀土催化合成等规聚苯乙烯

刘丽, 郑玉莲, 龚志, 景遐斌   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1997-01-04 修回日期:1997-06-03 出版日期:1997-10-10 发布日期:1997-10-10

Isospecific Polymerization of Styrene with Rare Earth Catalyst

Liu Li, Zheng Yulian, Gong Zhi, Jing Xiabin   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-01-04 Revised:1997-06-03 Published:1997-10-10 Online:1997-10-10

摘要: 催化合成等规聚苯乙烯的催化剂主要有钛、镍等体系[1, 2]. 稀土络合催化剂自 60 年代问世以来, 广泛应用于双烯烃的定向聚合, 得到高cis-1, 4结构的双烯烃聚合物[3], 而应用在苯乙烯定向聚合方面, 仅有少量文献报道[4], 并且聚合产物均为无规聚苯乙烯, 沈之荃等曾在稀土催化剂 Nd(naph)3体系中得到过富含间规结构的无规聚苯乙烯[5]. 本文采用 Nd(P507)3-H2O-Al(i-Bu)3催化体系使苯乙烯在己烷溶液中聚合, 产物经过沸腾丁酮-2 抽提处理, 得到等规聚苯乙烯。

关键词: 等规聚苯乙烯, 稀土配位催化剂, 苯乙烯, 配位聚合

Abstract: A rare earth coordination catalyst system: Nd(P507)3-H2O-Al(i-Bu)3 was used for isospecific polymerization of styrene. The polymers were extracted with boiling 2-butanone. 13C NMR and DSC data indicate that the extracted polystyrene is highly isotactic. The isospecificity is sensitive to the water added in the system. The conversion and isospecificity reach maximums at H2O-Al(i-Bu)3 molar ratio of 0.05~0.08.

Key words: isotactic polystyrene, rare earth coordination catalyst, styrene, stereospecific polymerization