基于DSC 法的RTM 工艺用6421 双马树脂固化反应分析

采用DSC方法分析了RTM工艺用6421双马树脂的固化反应,确定了固化度与温度和固化反应速率与时间之间的关系,基于Melak方法分析了固化反应过程,通过数据拟合法得到了n级固化模型、自催化模型及Kamal模型方程中的各个参数值。根据相关系数R2确定了适合的动力学模型。结果表明,6421双马树脂的固化度—温度曲线呈现"S"型,固化反应速率随升温速率的增大而增大;树脂固化反应的表观活化能Ea为105.611 kJ/mol,其固化动力学模型符合Kamal固化模型,模型方程对实验数据拟合结果良好。

Analysis of Curing Reaction of 6421 BMI Resinfor RTM Process Based on DSC Method

The cure reaction behavior of 6421 BMI resin was investigated by the DSC method.The relationship between the curing degree and temperature as well as curing rate and time were obtained.Based on Melak method,the curing reaction behavior was analyzed.The corresponding parameters of the n-order curing model,the autocatalytic model and the Kamal model were determined by fitting the experimental data,respectively.According to the coefficient values of R2,a suitable curing reaction kinetic model was determined.It was found that the curves of curing degree vs temperature presented a "S" shape and the curing rate increased with the rising heating rate.The apparent activation energy Ea of curing reactions is 105.611 kJ/mol,while the curing reaction conformed to the Kamal reaction kinetic model.The Kamal model is in a good agreement with the experimental data.