差示扫描量热法测定合成树脂乳液玻璃化转变温度的研究

Determination of Glass Transition Temperature of Emulsion via Differential Scanning Calorimetry

本研究通过真空干燥法将合成树脂乳液中溶剂除去,利用差示扫描量热法测定树脂乳液玻璃化转变温度,对测定过程的影响因素进行分析,选出了针对合成树脂乳液特性的前处理方法及测定方法。并对方法的重复性及再现性进行了计算,相对重复性≤1%,相对再现性≤1%。该方法操作简单,重复性、再现性较高,为检测合成树脂乳液玻璃化转变温度提供了理论依据,同时为企业原材料监管提供了简便、稳定的测试方法。

In this paper, the solvents in emulsion are removed by vacuum drying, and then the Tg of the emulsion is determined via differential scanning calorimetry （DSC）. The method for pretreatment and emulsion characterization is selected via discussion on influential factors occurred in determination progress. The repeatability and reproducibility of the method are examined, indicating the relative repeatability ≤ 1% and the relative reproducibility ≤ 1%. The method is characterized by easy-to-use, good reproducibility and reproducibility, which is useful for providing companies with a simple and convenient quality supervision meth- od for raw materials.