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高等学校化学研究 ›› 1995, Vol. 11 ›› Issue (3): 238-242.

• Articles • 上一篇    下一篇

Rare Earth Polymer Complex Catalyst for Ring Opening Polymerization of Epichlorohydrin

SHEN Zhi-quan, JIANG Dong-lin, ZHANG Yi-feng   

  1. Department of Polymer Science and Engineering, Zhejiang Uniuersity, Hangzhou, 310027
  • 收稿日期:1994-12-30 出版日期:1995-08-24 发布日期:2011-08-17
  • 基金资助:

    Supported by the State Eduction Commission of China for Chinese University Doctoral Research Fund.

Rare Earth Polymer Complex Catalyst for Ring Opening Polymerization of Epichlorohydrin

SHEN Zhi-quan, JIANG Dong-lin, ZHANG Yi-feng   

  1. Department of Polymer Science and Engineering, Zhejiang Uniuersity, Hangzhou, 310027
  • Received:1994-12-30 Online:1995-08-24 Published:2011-08-17
  • Supported by:

    Supported by the State Eduction Commission of China for Chinese University Doctoral Research Fund.

PDF (PC)

摘要： A novel complex composed of chitosan(CS) and neodymium(Nd) was preparedand the ring opening polymerization of epichlorohydrin(ECH) with a new catalyticsystem comprising this new rare earth polymer complex(CS·Nd) has been suc-cessfully carried out for the first time.It has been found that the new catalytic sys-tem composed of CS·Nd-AI (i-Bu)3-methyl benzoxylate( Ⅲ) is an excellent cata-lyst for the polymerization of epichlorohydrin which shows a catalytic activity 60 times higher tlian that of conventional rare earth catalyst.Under the following re-action conditions: Nd=1 ×10-6 mo1/g monomer, A1/Nd= 60 molar ratio, Ⅲ/A1=0.6 molar ratio, the monomer conversion and PECH molecular weight are as highas 92.9% and 28.2 × 105 respectively and the polymer prepared has a low crys-tallinity.The kinetics investigation revealed that the polymerization has a short in-duction period of several minutes and the rate of polymerization is of first orderwith respect to the monomer concentration and the catalyst concentration.The acti-vation energy of the polymerization reaction was found to be 25.5 kJ/mol which islower than that of conimon rare earth catalvst.

关键词: Neodymium cliitosan complex, Epichlorohydrin, Ring opening poly-merlzation

Abstract: A novel complex composed of chitosan(CS) and neodymium(Nd) was preparedand the ring opening polymerization of epichlorohydrin(ECH) with a new catalyticsystem comprising this new rare earth polymer complex(CS·Nd) has been suc-cessfully carried out for the first time.It has been found that the new catalytic sys-tem composed of CS·Nd-AI (i-Bu)3-methyl benzoxylate( Ⅲ) is an excellent cata-lyst for the polymerization of epichlorohydrin which shows a catalytic activity 60 times higher tlian that of conventional rare earth catalyst.Under the following re-action conditions: Nd=1 ×10-6 mo1/g monomer, A1/Nd= 60 molar ratio, Ⅲ/A1=0.6 molar ratio, the monomer conversion and PECH molecular weight are as highas 92.9% and 28.2 × 105 respectively and the polymer prepared has a low crys-tallinity.The kinetics investigation revealed that the polymerization has a short in-duction period of several minutes and the rate of polymerization is of first orderwith respect to the monomer concentration and the catalyst concentration.The acti-vation energy of the polymerization reaction was found to be 25.5 kJ/mol which islower than that of conimon rare earth catalvst.

Key words: Neodymium cliitosan complex, Epichlorohydrin, Ring opening poly-merlzation