高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (10): 1966-1968.

• 研究简报 • 上一篇    下一篇

氯化稀土催化ε-己内酯开环聚合

杨雄发, 倪旭峰, 沈之荃   

  1. 浙江大学高分子科学研究所, 杭州310027
  • 收稿日期:2004-11-18 出版日期:2005-10-10 发布日期:2005-10-10
  • 基金资助:

    国家自然科学基金重点项目(批准号:20434020)资助.

Ring-opening Polymerization of ε-Caprolactone Catalyzed by Rare Earth Chloride

YANG Xiong-Fa, NI Xu-Feng, SHEN Zhi-Quan   

  1. Institute of Polymer Science,Zhejiang University,Hangzhou 310027,China
  • Received:2004-11-18 Online:2005-10-10 Published:2005-10-10

关键词: 氯化稀土, N, N-二甲基甲酰胺, 环氧丙烷, &epsilon, -己内酯, 开环聚合

Abstract: Ring-opening polymerization of ε-caprolactone catalyzed by rare earth chloride dissolved in N,N-dimethylformamide and adding a small amount of propylene oxide was studied.The optimum conditions for the ring-opening polymerization of CL are as follows.In the bulk polymerization: n(DMF)/n(LaCl3)=10,n(PO)/n(LaCl3)=20,aging temperature: 30 ℃,aging time: 1 h,c(CL)=7.91×10-3 mol/L,c(LaCl3)=1.58×10-5 mol/L,the polymerization carried out at 30 ℃ for 1 h,yield=83.3%,Mν=1.93×104.In the solution polymerization: n(DMF)/n(LaCl3)=10,n(PO)/n(LaCl3)=20,aging temperature: 30 ℃,aging time: 1 h,toluene as the solvent,c(CL)=4.22×10-3 mol/L,c(LaCl3)=8.43×10-6 mol/L,the polymerization was carried out at 30 ℃ for 2 h,yield=62.9%,Mν=1.21×104.

Key words: Rare earth chloride, N,N-Dimethylformamide, Propylene oxide, ε-Caprolactone, Ring-opening polymerization

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