高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (6): 968.

• 论文 • 上一篇    下一篇

自由基交联共聚合体系凝胶点和凝胶形成机理

罗英武, 翁志学, 黄志明, 潘祖仁   

  1. 浙江大学高分子科学与工程研究所, 杭州, 310027
  • 收稿日期:1996-05-30 出版日期:1997-06-24 发布日期:1997-06-24
  • 通讯作者: 罗英武, 男, 27岁, 博士后.
  • 作者简介:罗英武, 男, 27岁, 博士后.
  • 基金资助:

    国家自然科学基金

Gel Point and Mechanism of Gel Formation in Copolymers from Free-Radical Crosslinking Polymerization of Vinyl/Divinyl Monomers

LUO Ying-Wu, WENG Zhi-Xue, HUANG Zhi-Ming, PAN Zu-Ren   

  1. Institute of Polymer Science and Engineering, Zhejang University, Hangzhou, 310027
  • Received:1996-05-30 Online:1997-06-24 Published:1997-06-24

摘要: 通过分析几个有代表性的单烯/二烯自由基交联模型的计算机模拟结果,认为凝胶点判据和凝胶形成机理是两个相互联系但决不相同的概念.将体系中首次出现分子平均交联密度等于的分子作为凝胶点判据.凝胶形成过程可分为成核与生长两个阶段,成核条件为溶胶分子平均交联密度等于1/DPpw的分子作为凝胶点判据.凝胶形成过程可分为成核与生长两个阶段,成核条件为溶胶分子平均交联密度等于1/DPpw.

关键词: 凝胶点, 凝胶形成机理, 自由基聚合, 交联

Abstract: After discussing the results from the computer simulations of gel point in the vinyl/divinyl monomer free-radical crosslinking polymerization by several typical models, the authors proposed that gel point be distinguished from mechanism of gel formation. The crite-ria of gel point is the appearing of the macromolecule whose average crosslinking density is equal to 1/DPpwHowever, the gel formation can have two processes of nucleation and growth, where the condition of nucleation is that the average crosslinking density in one macromolecule of a sol becomes1/DPpw

Key words: Gel point, Gel formation mechanism, Free-radical polymerization, Crosslinking

TrendMD: