针对高性能航空复合材料用环氧树脂的固化反应,采用非等温差示扫描量热仪(DSC)对其进行研究.通过模拟n级反应动力学模型,利用Kissinger方程、Arrihenius公式等以及特征温度-升温速率外推法,计算出该固化体系的表观活化能Ea、指前因子A和固化反应级数n等动力学参数以及最佳固化温度.结果表明,环氧树脂的固化起始温度Ti 为142.40℃,固化温度Tp为228.26℃,后固化温度Tf为267.67℃,固化时间为32 min.
Curing Reaction Kinetics of Epoxy Resins for High Performance Aerospace Composites
The curing reaction of epoxy resins for high performance aerospace composites was studied by non-isothermal DSC(differential scanning calorimetry).By simulating the n-order reaction kinetics model,the Kissin-ger model,Arrihenius model and the characteristic temperature-warming rate extrapolation method were used to calculate the apparent activation energy Ea,pre-exponential factor A,solidification reaction order n and the optimal curing temperature.The results show that the initial temperature(Ti)is 142.40℃,the peak temperature(Tp)is 228.26℃,the finishing temperature(Tf)is 267.67℃,and the curing time is 32 min.
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