高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (5): 820.

• 研究快报 • 上一篇    下一篇

稀土化合物催化内酯开环聚合(Ⅲ)──氯化钕-环氧化合物体系催化ε

申有青, 沈之荃, 沈建良, 张富尧, 张一烽   

  1. 浙江大学高分子科学与工程学系, 杭州, 310027
  • 收稿日期:1994-12-31 修回日期:1995-03-08 出版日期:1995-05-24 发布日期:1995-05-24
  • 通讯作者: 沈之荃
  • 作者简介:申有青,男,27岁,博士研究生.
  • 基金资助:

    国家自然科学基金

Ring-opening Polymerization of Lactones Catalyzed by Rare Earth Compounds(Ⅲ)──Bulk Polymerization of ε-Caprolactone with Neodymium Chloride-Epoxide System

SHEN You-Qing, SHEN Zhi-Quan, SHEN Jian-Liang, ZHANG Fu-Yao, ZHANG Yi-Feng   

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027
  • Received:1994-12-31 Revised:1995-03-08 Online:1995-05-24 Published:1995-05-24

关键词: 氯化钕, 环氧化合物, &epsilon, -己内酯, 本体聚合

Abstract: Bulk polymerization of ε-caprolactone(CL) with neodymium chloride-epoxide sys tem has been studied. It was found that the addition of epoxide can greatly increase the catalytic activity of neodymium chloride. The catalytic activity sequence of NdCl3 combined with epoxide is: NdCl3-ethylene oxide > NdCl3-proplene oxide > NdCl3-epichlorohydrin≈NdCl3-allyl glycidyl ether. The catalytic activity of NdCl3-proplene oxide system increases,but molecular weight of resulting polycaprolactone(PCL) decreases at higher proplene oxide/ neodymium chloride molar ratio.The molecular weight of PCL can be controlled by catalyst concentration. Higher polymerization temperature can greatly increase the catalytic efficien cy. At 30℃, PCLwith molecular weight as high as 28. 9×104can be prepared easily with an activity of 44×104g PCLper molar neodymium, and at 60℃, the molecular weight of PCLand catalytic efficiency increased to 42×104and 106g PCL/mole Nd respectively.

Key words: Neodymium chloride, Epoxide, ε-Caprolactone, Bulk polymerization

中图分类号: 

TrendMD: