ETHYLENE OXIDE POLYMERIZATION USING THE RARE- EARTH COORDINATION CATALYSTS

ZHANG Yi-feng; SHEN Zhi-quan

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ETHYLENE OXIDE POLYMERIZATION USING THE RARE- EARTH COORDINATION CATALYSTS

Research Article | 更新时间：2021-03-19

- ETHYLENE OXIDE POLYMERIZATION USING THE RARE- EARTH COORDINATION CATALYSTS
- Acta Polymerica Sinica Issue 6, Pages: 469-473(1988)
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- Published：20 December 1988，
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ZHANG Yi-feng, SHEN Zhi-quan. ETHYLENE OXIDE POLYMERIZATION USING THE RARE- EARTH COORDINATION CATALYSTS. [J]. Acta Polymerica Sinica (6):469-473(1988)
DOI：

ZHANG Yi-feng, SHEN Zhi-quan. ETHYLENE OXIDE POLYMERIZATION USING THE RARE- EARTH COORDINATION CATALYSTS. [J]. Acta Polymerica Sinica (6):469-473(1988) DOI：

摘要

以稀土化合物-二(2-乙基己基)膦酸钕[Nd(P2043]

三异丁基铝和水组成的络合催化剂

引发环氧乙烷聚合.结果表明

稀土络合催化剂是制备高分子量聚环氧乙烷的新型催化剂.聚合反应速度与环氧乙烷浓度呈一级关系

与Nd(P204)3浓度呈一级关系.聚合的总活化能Eα=33.8kJ/mol

表观速率常数Kp=1.67×10-3s-1·mol-1·1.

Abstract

Ring opening polymerization of ethylene oxide by using coordination catalysts composed of neodymium 2-ethylhexyl phosphonates-triisobutyl aluminium-water in toluene have been studied. It was found that the catalytic activity of rare-earth coordination catalysts and visco--sity-average molecular weights of PEO obtained both are high. The kinetics for the polymerization of EO with Nd(P204)3 -Al(i-Bu)3-H2O system in toluene at 60℃ has been studied. The overall polymerization activation energy E. measured wat 33.8kJ/mol.and the rate equ-ation could be expressed as Rp=Kp[EO] [Nd(P204)3]

where Kp=1.67×10-3mol-1s-1.l.

关键词

稀土配位催化剂环氧乙烷聚合动力学聚环氧乙烷

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