Kinetics and nucleation mechanism of acrylate emulsion polymerization modified by vinyl alkoxy silane

ZHANG Xinya; HUANG Hong; LI Yongjin; SHEN Huifang; LAN Renhua; CHEN Huanqin

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Kinetics and nucleation mechanism of acrylate emulsion polymerization modified by vinyl alkoxy silane

更新时间：2025-12-10

- Kinetics and nucleation mechanism of acrylate emulsion polymerization modified by vinyl alkoxy silane
- CIESC Journal Issue 1, Pages: 197-202(2006)
- 作者机构：
  
  华南理工大学化工学院化工研究所,广东,广州,510641
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 January 2006，
  
  Published：25 January 2006
- 稿件说明：
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ZHANG Xinya, HUANG Hong, LI Yongjin, et al. Kinetics and nucleation mechanism of acrylate emulsion polymerization modified by vinyl alkoxy silane[J]. CIESC Journal, 2006, (1): 197-202.
DOI：

ZHANG Xinya, HUANG Hong, LI Yongjin, et al. Kinetics and nucleation mechanism of acrylate emulsion polymerization modified by vinyl alkoxy silane[J]. CIESC Journal, 2006, (1): 197-202. DOI：

摘要

用种子乳液聚合法研究了硅氧烷改性丙烯酸酯的乳液聚合，对影响种子乳液聚合动力学的因素进行讨论，并分析了乳液聚合的成核机理.实验结果表明：反应温度、引发剂浓度、乳化剂浓度和有机硅氧烷用量对有机硅改性丙烯酸酯乳液聚合动力学有较大的影响.反应温度越高，引发剂浓度越高、乳化剂浓度越高、有机硅氧烷用量相对较小，乳液聚合反应的转化率越高;此外，体系的pH值在6～8之间时也有利于反应的进行.种子乳液聚合中RP∝［E］0.72，RP∝［I］0.56，表观活化能Ea为143.92 kJ8226;mol-1.种子乳液聚合初期，反应主要是单体液滴成核;进入壳层反应时，反应成核主要是以胶束成核为主.

Abstract

The factors which influence polymeric kinetics of acrylate emulsion modified by vinyl alkoxy silane through seed emulsion polymerization were investigated

and the nucleation mechanism of emulsion polymerization was analyzed. The experimental results showed that reaction temperature

initiator concentration

emulsifier concentration and vinyl alkoxy silane amount had great influence on the kinetics of emulsion polymerization.At higher temperature

higher initiator concentration

higher emulsifier concentration and less amount of vinyl alkoxy silane monomer

the conversion rate of emulsion polymerization was higher.Besides

the pH value of the system between six and eight was favorable to emulsion polymerization kinetics.In the seed emulsion polymerization

RP∝［E］0.72，RP∝［I］0.56，Ea=143.92 kJ8226;mol-1. At the beginning of the shell reaction

nucleation of emulsion polymerization occurred in monomer droplet，while during core reaction

the nucleation mechanism was “micellar nucleation”.

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