应用化学 ›› 1995, Vol. 0 ›› Issue (6): 59-61.

• 研究论文 • 上一篇    下一篇

稀土乙酰丙酮盐催化聚合ε-己内酯和丙交酯

刘建飞, 沈之茎, 孙俊全   

  1. 浙江大学高分子科学与工程系, 杭州 310027
  • 收稿日期:1994-12-27 修回日期:1995-05-03 出版日期:1995-12-10 发布日期:1995-12-10
  • 基金资助:
    国家自然科学基金资助课题

Polymerization of ε-Captolactone and Lactide with Rare Earth Acetylacetonates

Liu Jianfei, Shen Zhiquan, Sun Junquan   

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027
  • Received:1994-12-27 Revised:1995-05-03 Published:1995-12-10 Online:1995-12-10

摘要: 聚己内酯和聚丙交酯具有良好的生物相容性,在生物医药领域有广泛用途.因而丙交酯和己内酯的催化开环聚合引起广泛注意.所用催化剂主要是烷氧基金属,最近也有稀土金属烷氧基化合物作催化剂的报道.由于目前报道的催化剂有的在空气中不稳定,在合成上较麻烦,因此寻找方便易得的催化剂仍是有待解决的问题.因为稀土乙酸丙酮盐Ln(acac)3较易制得和在空气中稳定,本文研究了稀土乙酞丙酮盐对己内酯和丙交酯的聚合规律。

关键词: ε-己内酯, 丙交酯, 稀土乙酰丙酮盐, 开环聚合

Abstract: It is found that rare earth acetylacetonates can initiate the ring-opening polymer-ization of ε-caprolactone and lactide.The effects of temperature solvent,polymerizationtime,rare earth element and ligand were studied.The results showed that rare earth acety-lacetonates,particularly Y(acac)3,were good catalysts for the polymerization of ε-caprolac-tone and lactide, Crystalline polycaprolactone with viscosity-average molecular weight of 1.4×105 could be obtained at 80℃ in quantitative yield.

Key words: ε-caprolactone, lactide, rare earth acetylacetonate, ring-opening polymerization