室温自交联含氟乳液聚合反应的稳定性研究Research on Polymerization Stability of Self-crosslinking Fluorine-containing Latex at Ambient Temperature
秦总根,涂伟萍,夏正斌,沈良军
摘要(Abstract)：
在树脂中引入含氟单体和自交联单体制成自交联含氟乳液,不仅能降低成本,而且能赋予含氟聚合物优异的性能,但树脂中 C-F 基团和自交联剂的引入使聚合反应的稳定性受到很大的影响。今采用种子乳液聚合法,对影响自交联含氟乳液聚合反应稳定性的主要因素进行探讨,结果表明:加入 0.1%以上的含氟乳化剂,乳液聚合稳定性得到明显提高;当引发剂用量为 0.5%、聚合温度为 60℃时,聚合的稳定性和转化率达到最佳;N-MA 不宜过多,以小于 6%为宜;为确保聚合稳定进行,pH 为 5 时比较理想。从 FTIR、DSC 以及聚合物的性能表征来看,通过优化聚合条件,得到了性能较好的自交联含氟乳液。
关键词(KeyWords)： 自交联;含氟乳液;聚合;稳定性
基金项目(Foundation): 863 课题(2002AA322020)
作者(Author): 秦总根,涂伟萍,夏正斌,沈良军
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