应用化学 ›› 1993, Vol. 0 ›› Issue (3): 91-93.

• 研究简报 • 上一篇    下一篇

稀土催化剂本体聚合异戊二烯的生胶性能

张新惠, 李柏林, 刘亚东, 龚志   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1992-05-12 修回日期:1992-10-06 出版日期:1993-06-10 发布日期:1993-06-10
  • 基金资助:
    国家自然科学基金资助项目

THE PROPERTIES OF POLYISOPRENE GUM BULK POLYMERIZED BY RARE-EARTH CATALYST

Zhang Xinhui, Li Bailin, Liu Yadong, Gong Zhi   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun
  • Received:1992-05-12 Revised:1992-10-06 Published:1993-06-10 Online:1993-06-10

摘要: 本体聚合与溶液聚合相比,具有能耗低,反应平稳,转化率高等特点。杨彩云等用稀土催化剂对异戊二烯(Ip)进行本体聚合,聚合转化率达80%以上,聚合物中无疑胶,且分子量分布较窄(Mw/Ma<2)。本文报道和讨论本体聚合放大试验胶样的生胶特性。

关键词: 聚异戊二烯, 本体聚合, 稀土催化剂, 合成橡胶

Abstract: The properties of polyisoprene bulk polymerized with rare-earth catalyst (Ln-IR) are reported. The Mooney viscosity(ML) values of Ln-IR are obviously higher than that of Ln-IR obtained in solution polymerization with the same [η]. Under certain polymerization conditions, some long branching chains may occur in the molecular structure of Ln-IR. The cis-1,4 content of Ln-IR was slightly lower than that of Ti-IR and NR, but the stress-strain property and viscoelasticity were basically the same as that of Ti-IR. The bulk Ln-IR showed a good fluidity at higher shear rate. The activation energy of viscous flow was about 11.0 kJ/mol, equal to that of Ti-IR, but slightly lower than that of NR.

Key words: polyisoprene, bulk polymerization, rare-earth catalyst, synthetic rubber