摘要： 以差示扫描量热(DSC)为主要研究手段, 通过对涂膜的玻璃化转变温度的分析, 研究了乳胶粒粒径、固化温度和固化剂的活性对Ⅱ型胺 -水性环氧双组分体系固化程度的影响。 研究发现, 水性环氧树脂乳胶粒粒径越小, 水性环氧体系的固化程度越高;Ⅱ型水性环氧体系的固化存在最佳的固化温度, 在此温度下, 体系的固化反应程度最高,涂膜的综合性能最佳;仲胺类固化剂与环氧树脂乳胶粒的固化程度比伯胺类固化剂的高。

关键词: 水性环氧树脂;固化程度;玻璃化转变温度;DSC

Abstract: By use of differentia l scanning calorimetry (DSC) for analysis of the glass transition temperature,the in fluence o f latex particle size,curing tempe rature and reactivity of curing agents on the curing extent of the waterborne epoxy/am ine system Ⅱ have been studied.It is found that the smaller size of latex particle results in higher curing ex tent ofwaterborneepoxy /amine system Ⅱ,and the system has aoptimized curing temperature, atwhich it shows the best comprehensive properties o f the film and highest curing extent,and the curing extentwith second amine higher than thatwith primaryamine.

Key words: waterborne epoxy resin;curing extent;glass transition temperature;DSC