Abstract: ［Objective］To investigate the curing kinetics of the curing process for a waterborne epoxy-amine system，establish a more accurate thermal kinetic model，and provide guidance for the formulation design of waterborne epoxy coatings.［Methods］Based on differential scanning calorimetry（DSC）test data for the curing of a two-component waterborne epoxy resin and the Kamal-Sourour（KS）model，a KS & diffusion model（abbreviated as KS & diff）was developed by incorporating a Williams-Landel-Ferry（WLF）equation-based diffusion correction. Furthermore，combining the KS-diff model with DSC isothermal testing，the Time-Temperature-Transformation（TTT）diagram for this waterborne epoxy resin curing was constructed.［Results］ The KS-diff model achieved 97. 8% agreement with the experimental DSC data for simulating the curing kinetics of the waterborne epoxy-amine system. The experimentally determined degree of cure from isothermal tests agreed well with themodel predictions. Furthermore，the curing states predicted by the TTT diagram correlated well with thecoating's hygrothermal resistance performance.［Conclusion］ The KS-diff model can effectivelysimulate the curing kinetics of the waterborne epoxy-amine system and provide valuable guidance forformulating waterborne epoxy coatings.

Key words: waterborne epoxy, curing kinetics, TTT diagram

摘要： 【目的】研究水性环氧胺体系固化过程热动力学，建立更加精确的水性环氧胺体系固化热动力学模型，对水性环氧涂料配方设计提供指导。【方法】基于双组分水性环氧树脂固化 DSC测试数据和 KS模型，引入WLF方程扩散修正，建立了 KS&diffusion（以下简称 diff）热动力学模型；进一步结合 KS&diff模型和 DSC等温测试，绘制该水性环氧树脂固化 TTT（等温转变曲线）图。【结果】 KS&diff模型对水性环氧胺固化热动力学模拟程度达到 97. 8%，等温测试得到的固化程度与模拟固化程度较为接近，绘制的 TTT图中预测的结果与涂层的耐湿热性能具有一致性。【结论】 KS&diff模型可以较好地模拟水性环氧胺体系固化热动力学过程，对水性环氧涂料配方设计具有指导作用。

关键词: 水性环氧, 固化动力学, TTT图

CLC Number: 

• TQ630.4