高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (11): 1800.

• 论文 • 上一篇    下一篇

MMA/BA/聚乙二醇马来酸单酯钠盐无皂乳液聚合的成粒机理

张茂根, 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:1998-10-15 出版日期:1999-11-24 发布日期:1999-11-24
  • 通讯作者: 张茂根,男,35岁,副教授,博士研究生.
  • 作者简介:张茂根,男,35岁,副教授,博士研究生.

Particle Formation Mechanism in the Emulsifier-free Emulsion Polymerization of MMA/BA/Sodium Polyethylene Glycol Maleate

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

  1. Institute of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:1998-10-15 Online:1999-11-24 Published:1999-11-24

PDF (PC)

被引次数

16

摘要： 研究了在少量聚乙二醇马来酸单酯钠盐存在下,MMA/BA无皂乳液聚合成粒过程,发现聚合初期产生的初级粒子消失后,两次周期性地产生小粒子。经分析,是新的成核作用产生的,表明在聚合的中晚期,成核过程并未真正结束,而是处于成核-聚并的动态平衡之中。

关键词: 无皂乳液聚合, 成粒机理, 周期成核现象

Abstract: The particle formation mechanism of MMA/BA emulsifier-free emulsion polymerization in the presence of small amount of ZA-6 comonomer(sodium polyethylene glycol 600 maleate) was investigated with Coulter LS230 laser particle size analyzer. After the primary particles of the early stage have vanished, new small particles were twice found periodically. It is believed to be formed by new nucleations by theoretical and data analyses and is called periodic nucleation phenomenon. It is suggested that the nucleation processes do not end really at the middle and later stages of the polymerization, and it is in the dynamic equilibrium of nucleation and aggregation.

Key words: Emulsifier-free emulsion polymerization, Particle formation mechanism, Periodic nucleation phenomenon

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