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三氟甲磺酸稀土催化ε-己内酯开环聚合

朱蔚璞, 童晓薇, 沈之荃   

  1. 浙江大学高分子科学研究所, 教育部高分子合成与功能构造重点实验室, 杭州 310027
  • 收稿日期:2006-11-26 修回日期:1900-01-01 出版日期:2007-06-10 发布日期:2007-06-10
  • 通讯作者: 沈之荃

Ring-opening Polymerization of ε-Caprolactone Catalyzed by Rare Earth Trifluoromethanesulfonate [Ln(OTf)3] Catalysts

ZHU Wei-Pu, TONG Xiao-Wei, SHEN Zhi-Quan*   

  1. Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China
  • Received:2006-11-26 Revised:1900-01-01 Online:2007-06-10 Published:2007-06-10
  • Contact: SHEN Zhi-Quan

摘要: 采用三氟甲磺酸稀土(镧、钕、铒)作为单组分催化剂催化了ε-己内酯的本体开环聚合反应. 考察了稀土元素种类、催化剂浓度、聚合时间及温度对单体转化率和聚合产物分子量的影响. 该类催化剂在催化聚合过程中具有单一活性中心, 且催化活性较高. 此聚合反应可能是通过阳离子活性末端链聚合机理进行的.

关键词: 三氟甲磺酸稀土, ε-己内酯, 开环聚合

Abstract: The ring-opening polymerization of ε-caprolactone(CL) catalyzed by rare earth trifluoromethanesulfonate [Ln(OTf)3](Ln= Nd, Er, La) catalysts was reported. The influences of rare earth element, catalyst concentration, polymerization time and temperature on the monomer conversion and polymer molecule weight were investigated. These catalysts exhibit a high catalytic activity with single active center. The polymerization may proceed via active chain end cationic machanism.

Key words: Rare earth trifluoromethanesulfonate, ε-Caprolactone, Ring-opening polymerization

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