采用FT-IR跟踪法研究了双酚S与环氧氯丙烷的醚化反应，使用回归分析法研究了醚化物在FT-IR中的醚键特征峰强度与酚羟基转化率之间的关系，结果表明两者间存在良好的二次函数关系。建立了FT-IR法测定醚化反应中酚羟基转化率的标准工作曲线，利用该曲线研究了双酚S与环氧氯丙烷的醚化反应动力学，结果表明，在环氧氯丙烷大大过量的情况下，醚化反应速率与酚羟基浓度相关，当酚羟基浓度小于临界浓度时，该反应为一级反应；当酚羟基浓度大于临界浓度时，该反应为零级反应。

The etherification reaction of bisphenol-S (BPS) and epichlorohydrin (ECH) has been studied by a quantitative FT-IR method. The relationship between the changes in the absorption intensities of the FT-IR stretching bands corresponding to phenolic hydroxyl groups and the ether group was studied by regression analysis. The results showed that they have an excellent quadratic function correlation. Based on this result, a standard working curve was set up which could be used to measure the conversion rate of the phenolic hydroxyl group in the etherification reaction of BPS and ECH. This curve was also used in studying the kinetics of the etherification reaction of BPS and ECH. The results showed that the reaction rate is determined by the concentration of the phenolic hydroxyl groups when the ECH is present in large excess. However there is a critical concentration of phenolic hydroxyl groups. When the concentration of the phenolic hydroxyl groups is less than the critical concentration, the reaction follows first order kinetics, with the reaction rate being proportional to the concentration of phenolic hydroxyl groups. However when the concentration of the phenolic hydroxyl groups is greater than the critical concentration, the reaction is zero order, and the reaction has a maximum reaction rate, which is not related to the concentration of phenolic hydroxyl groups.