HOMOPOLYMERIZATION AND COPOLYMERIZATION OF STYRENE AND DIVINYLBENZENE BY RARE-EARTH COORDINATION CATALYSTS

YANG Mu-jie; ZHANG Hao; ZHAO Jian; SHEN Zhi-quan

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HOMOPOLYMERIZATION AND COPOLYMERIZATION OF STYRENE AND DIVINYLBENZENE BY RARE-EARTH COORDINATION CATALYSTS

Research Article | 更新时间：2021-03-19

- HOMOPOLYMERIZATION AND COPOLYMERIZATION OF STYRENE AND DIVINYLBENZENE BY RARE-EARTH COORDINATION CATALYSTS
- Acta Polymerica Sinica Issue 4, Pages: 441-446(1990)
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- Published：20 August 1990，
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YANG Mu-jie, ZHANG Hao, ZHAO Jian, SHEN Zhi-quan. HOMOPOLYMERIZATION AND COPOLYMERIZATION OF STYRENE AND DIVINYLBENZENE BY RARE-EARTH COORDINATION CATALYSTS. [J]. Acta Polymerica Sinica (4):441-446(1990)
DOI：

YANG Mu-jie, ZHANG Hao, ZHAO Jian, SHEN Zhi-quan. HOMOPOLYMERIZATION AND COPOLYMERIZATION OF STYRENE AND DIVINYLBENZENE BY RARE-EARTH COORDINATION CATALYSTS. [J]. Acta Polymerica Sinica (4):441-446(1990) DOI：

摘要

应用稀土化合物:环烷酸钕Nd(naph)3和二(2-乙基己基)磷酸钕Nd·(P2043分别与三异丁基铝Al(i-Bu)3组成络合催化剂引发苯乙烯均聚及其与二乙烯苯共聚。适宜的聚合温度为50℃:[Nd]=3×10-5mol/ml;[M]=3×10-3mol/ml;Al/Nd=10(摩尔比)

并且催化剂按以下次序配制:钕化合物→溶剂→苯乙烯→三异丁基铝

苯乙烯的转化率在90％以上。溶剂种类及聚合条件不同

制得的聚苯乙烯可为白色或黄色粉末状无定形聚合物

分子量几百至上万。聚合体系中添加PeCl3能抑制黄色产生。在共聚反应中

二乙烯苯比苯乙烯显示较高的反应活性。

Abstract

Rare-earth coordination catalysts were used for the first time for the homopo-lymerization and

copolymerization of styrene (St) and divinylbenzene (DVB). Fea rtures of the polymerization of St and DVB by Nd(naph)3-Al (i-Bu)3 and Nd. (P204)3-Al(i-Bu)3 systems have been investigated. The conversion of styrene was more than 90% under the optimum conditions ([Nd] = 3 ×10-5 mol/ml; [M] = 3×10-3mol/ml

Al/Nd= 10(mole ratio)

50℃)

while the catalyst system prepared by the following addition order:Nd-solvent-St-Al. With the variation of polyme-rization conditions and solvents

rere-earth polystyrene obtained was white or yellow powder showing atactic structure. Number-average molecular weight of PSt obtained ranges from 102 to 104.FeCl3 added to the polymerization system may suppress forr-ming yellow colur powder. DVB showed higher activity than styrene in copolyme-rization.

关键词

稀土催化苯乙烯二乙烯苯聚合特征

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