Chinese Journal of Applied Chemistry

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Terpolymerization of Carbon Dioxide-Propylene Oxide-Cyclohexene Oxide by Cyclohexene Oxide Continuous Feeding

ZHANG Yaming1,2, GAO Fengxiang1, ZHOU Qinghai1, QIN Yusheng1, WANG Xianhong1*, WANG Fosong1   

  1. (1.Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,
    Chinese Academy of Sciences,Changchun 130022,China;
    2.University of Chinese Academy of Sciences,Beijing 100049,China)
  • Received:2014-07-14 Revised:2014-08-21 Published:2014-11-08 Online:2014-11-08
  • Contact: Xian-Hong WANG

Abstract: The copolymerization reaction rate of cyclohexene oxide(CHO) and carbon dioxide is faster than that of propylene oxide(PO) and carbon dioxide, which leads to the difficulty in controlling the composition of the CHO-PO-CO2 terpolymer from onepot synthesis. In this work, continuous feeding of CHO was used for the terpolymerization of CHO, PO and CO2 under a ternary rare earth metal coordination catalyst. Its catalytic activity can reach 575 g/(mol Zn h). Terpolymer PPCH100x(x is the molar farction of CHO in total oxides in comonomer feed) from the continuous process has only one glass transition temperature, while the terpolymer from one-pot synthesis has two glass transition temperatures. The glass transition temperature of PPCHx increases from 44.3 ℃ to 70.1 ℃ when the feed ratio of CHO increases from 0.19 to 0.59. It is encouraging to note that the composition of the terpolymer from continuous CHO feeding is similar to the feed ratio of comonomers, indicating that continuous feeding of comonomers is effective for controlling the composition of the terpolymer.

Key words: carbon dioxide, propylene oxide, cyclohexene oxide, continuous monomer feeding

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