催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (7): 588-590.

• 研究快讯 • 上一篇    下一篇

离子液体支载稀土催化剂催化2,2-二甲基-三亚甲基碳酸酯均聚及其与ε-己内酯的共聚

熊玉兵2,倪旭峰1,樊玲1,沈之荃1   

  1. 1 浙江大学高分子科学与工程系高分子科学研究所, 教育部大分子合成与功能构造重点实验室, 浙江杭州 310027; 2 西北师范大学化学化工学院, 甘肃省高分子材料重点实验室, 甘肃兰州 730070
  • 收稿日期:2007-07-25 出版日期:2007-07-25 发布日期:2011-07-25

Ring-Opening Polymerization of2,2-Dimethyltrimethylene Carbonate and Its Copolymerization with ε-Caprolactone by Ionic Liquid-Supported Rare Earth Metal Complex Catalysts

XIONG Yubing2, NI Xufeng1, FAN Ling1, SHEN Zhiquan1*   

  1. 1 Institute of Polymer Science, Department of Polymer Science and Engineering; Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Zhejiang University, Hangzhou 310027, Zhejiang, China; 2 Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, China
  • Received:2007-07-25 Online:2007-07-25 Published:2011-07-25

PDF

997

被引次数

4

摘要： 首次合成了离子液体支载稀土催化剂,并探讨了其催化2,2-二甲基-三亚甲基碳酸酯(DTC)均聚及其与ε-己内酯(ε-CL)的共聚,结果表明该新型催化剂能有效地催化DTC的均聚及其与ε-CL的共聚. 研究了不同稀土以及加料顺序等反应条件对聚合的影响,发现轻稀土的催化活性比重稀土高,其中离子液体支载La催化剂的催化活性最高,而通过控制不同的加料顺序可以制备DTC和ε-CL的无规及嵌段共聚物. 对共聚物结构进行了表征.

关键词: 稀土, 离子液体, 2-二甲基-三亚甲基碳酸酯, ε-己内酯, 共聚

Abstract: Homopolymerization of2,2-dimethyltrimethylene carbonate and its copolymerization with ε-caprolactone (ε-CL) catalyzed by ionic liquid-supported rare earth catalysts were investigated for the first time. The results indicated that this novel catalyst is effective for the homopolymerization and copolymerization. Of all the rare earth catalysts prepared, LaCl3 showed the highest catalytic activity and can be used to prepare poly(2,2-dimethyltrimethylene carbonate) with a viscosity average molecular weight of 3.61×104 and a yield over 88% under mild conditions of ε-CL/La molar ratio=200 and 60 ℃ in toluene. Moreover, both random and block copolymers can be prepared by changing the feed sequence with this catalyst only when ε-CL was polymerized first. When2,2-dimethyltrimethylene carbonate was polymerized first, only homopolymer can be prepared. The copolymers were characterized by1HNMR.

Key words: rare earth, ionic liquid, 2-dimethyltrimethylene, ε-caprolactone, copolymerization