橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2001 Vol.24 No.3 P.147-151

橡胶技术网

锌/钴双金属氰化络合物催化环氧丙烷聚合机理

刘晓华  亢茂青  王心葵 

摘 要:用以二乙二醇二乙醚为有机配体的锌/钴双金属氰化络合物进行了环氧丙烷的聚合,并用扩展X射线精细结构分析方法研究了催化剂激活和环氧丙烷聚合过程中锌离子和钴离子的区域结构变化。结果表明,锌/钴双金属氰化络合物催化环氧丙烷的聚合是一个活性聚合体系。在环氧丙烷聚合过程中锌离子由与3.0个氧原子配位转变为与5.7个氧原子配位,表明聚合活性中心为5.0个氧原子配位的螯合锌离子。
关键词:环氧丙烷;锌/钴双金属氰化络合物;催化剂;聚合;结构分析
分类号:TQ314.24+2 文献标识码:A

文章编号:1000-1255(2001)03-0147-05

Mechanism of propylene oxide polymerization on Zn/Co double metal cyanide complex catalyst

Liu XiaohuaInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China) 
Kang MaoqingInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China) 
Wang XinkuiInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China) 

AbstractThe characteristic of polymerization of propylene oxide on double metal cyanide(DMC)complex catalyst using diethyl glycol diethyl ether as organic complex and the local structures of Zn and Co ions in the process of propylene oxide polymerization were investigated. The results showed that the polymerization of propylene oxide catalyzed by DMC catalyst was a kind of living polymerization system. The coordination number of Zn and O increased from 3.0 to 5.7 in the process of DMC catalyst activation and in propylene oxide polymerization five 0 atoms coordinated Zn ion could be the real active center in the process of propylene oxide polymerization.
Keywords
propylene oxide; Zn/Co double metal cyanide complex; catalyst; polymerization; structural analysis

基金项目:中国科学院重点开发项目(批准号KY95-S1-401-02);天津石油化工公司重点开发项目。
作者简介:刘晓华,男,1973年生,博士。已申请3项中国发明专利,发表论文7篇。
作者单位:刘晓华(中国科学院山西煤炭化学研究所,山西太原030001) 
     亢茂青(中国科学院山西煤炭化学研究所,山西太原030001) 
     王心葵(中国科学院山西煤炭化学研究所,山西太原030001) 

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收稿日期:2000年3月23日

修稿日期:2000年11月3日

出版日期:2001年5月15日