木基材用低温透明粉末涂料的固化动力学研究

摘要

采用非等温示差扫描量热法（DSC）研究了环氧-聚酯低温透明粉末涂料体系的固化反应动力学。利用DSC数据，结合Kissinger、Doyle-Ozawa和Crane经验方程建立了该粉末涂料固化的动力学模型。结果表明：①该体系的凝胶温度、固化温度和后固化温度分别为95℃、145℃和175℃。②固化反应的平均表观活化能Ea为67.82 kJ·mol-1，频率因子A为2.92×107，反应级数0.92。③该涂料的分解温度为302℃。%The non-isothermal differential scanning calorimetry (DSC) is used to study the curing reaction kinetics of epoxy polyester low-temperature transparent powder coating system. The curing kinetic model of the powder coating system is established with DSC data, based on Kissinger, Doyle-Ozawa and Crane equations. The result shows: ① The gelation temperature, and curing temperature post curing temperature of the system are 95℃, 145℃and 175℃respectively.②The average surface curing reaction activation energy Ea is 67.82 kJ/mol-1, frequency factor A is 2.92×107 and the reaction order n is 0.92.③The decomposition temperature of the coating is 302℃.