论文部分内容阅读
运用非等温DSC(差示扫描量热)法对Sikapower-492G型汽车用EP(环氧树脂)结构胶在动态升温过程中的固化动力学进行了研究。根据不同升温速率时的DSC曲线,采用Kissinger法、Crane法、Ozawa法和温度-升温速率(T-β)外推法等得到该EP胶粘剂的动力学参数。结果表明:该EP胶粘剂体系的固化动力学可用1级固化动力学模型进行表征;该EP胶粘剂的凝胶化温度、固化温度和后处理温度约分别为123、164、224℃,其表观活化能、频率因子和反应级数等动力学参数分别为117 kJ/mol、1.80×1013 s-1和0.934。
The curing kinetics of EP (Epoxy) structural adhesive for Sikapower-492G automobile during dynamic heating was studied by non-isothermal DSC (differential scanning calorimetry). The kinetic parameters of EP adhesive were obtained by Kissinger method, Crane method, Ozawa method and extrapolation method of temperature-heating rate (T-β) according to the DSC curves at different heating rates. The results show that the curing kinetics of the EP adhesive system can be characterized by a one-stage kinetic model. The gelation temperature, curing temperature and post-treatment temperature of the EP adhesive are about 123,164,224 ℃, respectively. The apparent activation Kinetic parameters such as energy, frequency factor and reaction order were 117 kJ / mol, 1.80 × 1013 s-1 and 0.934, respectively.