摘要
研究了较大亲水性单体醋酸乙烯酯(VAc)乳液聚合动力学,着重剖析了自由基解吸的影响及水相中的聚合反应对总聚合反应速率的贡献,提出了阶段Ⅱ和阶段ⅢVAc乳液聚合数学模型,成功地预计了聚合反应速率、自由基在乳胶粒中的分布及乳胶粒中平均自由基数随转化率的变化规律.并将模型预计结果和实验数据进行了比较和讨论.
The kinetics of emulsion polymerization for the more hydrophilic monomer VAc is studied. The effect of free radical desorption and the contribution of the polymerization in aqueous phase to total polymerization rate are analyzed. A mathematical model for stage II and I of emulsion polymerization of VAc is proposed. It can be successfully used to predict the polymerization rate, the distribution of free radicals among latex particles and the change of the average number of free radicals in one particle along with monomer conversion. The model prediction and experimental data are compared and discussed.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1994年第6期651-657,共7页
CIESC Journal
基金
国家自然科学基金资助项目
关键词
自由基解吸
水相
醋酸乙烯酯
乳液聚合
radical desorption, polymerization in aqueous phase, vinyl acetate, emulsion polymerization
