高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (11): 1848.

• 论文 • 上一篇    下一篇

MMA/BA/双官能团单体无皂共聚乳液的稳定性

张茂根, 翁志学, 黄志明, 毛昕, 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:1997-10-13 出版日期:1998-11-24 发布日期:1998-11-24
  • 通讯作者: 张茂根,男,35岁,博士研究生,副教授.
  • 作者简介:张茂根,男,35岁,博士研究生,副教授.

Stability of Emulsifier-free Emulsion Copolymerization of MMA/BA/Comonomer with Two Functional Groups

ZHANG Mao-Gen, WENG Zhi-Xue, HUANG Zhi-Ming, MAO Xin, PAN Zu-Ren   

  1. Polymer Science and Engineering Institute, Zhejiang University, Hangzhou, 310027
  • Received:1997-10-13 Online:1998-11-24 Published:1998-11-24

摘要: 用马来酸酐和(聚)乙二醇合成了一系列双官能团共单体,将其用于MMA/BA无皂乳液共聚合.研究了共单体的空间效应、用量、加料方式对其无皂乳液稳定性的影响.用适当的共单体和半连续加料方式,可得到较稳定的乳液,粒径分布接近单分散.凝聚物的生成机理主要是失稳凝聚和架桥凝聚.

关键词: 无皂乳液, 双官能团共单体, 空间效应, 稳定性, 凝聚机理

Abstract: Aseries of functional comonomers with anionic and nonionic hydrophilic groups, sodium glycol maleate(SGM, or I-1) and sodium polyethylene glycol maleate (SPEGM, or I-2, I-4 and I-6) made from polyethylene glycol PEG200, PEG400 and PEG600, were synthesized and used in MMA/BAemulsifier-free emulsion copolymerization. The effects of the spatial effect, concentration and feeding mode of comonomer on the stability of the emulsifier-free latexes(EFL) were investigated. The stable and almost monodispersed EFLcan be obtained with appropriate comonomer and semicontinuous feeding mode. Coagulum in the emulsifier-free emulsion polymerization system was formed mainly by destabilizing coagulation mechanism owing to insufficient protecting groups on particles and by bridging coagulation mechanism caused by water-soluble homopolymer of comonomers or copolymers enriched with such comonomers.

Key words: Emulsifier-free latex, Comonomer with two functional groups, Spatial effect, Stability, Coagulation mechanism

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