快速RTM成型工艺用环氧树脂化学流变及固化行为研究

Studies on the chemical rheological behavior and curing of epoxy resin in rapid RTM process

针对快速RTM成型工艺对树脂性能的要求,研究了环氧树脂的化学流变行为和固化行为。根据其流变行为,发现采用双Arrhenius黏度模型方程可以有效预测树脂的成型工艺窗口;根据其固化反应行为,通过Malek方法,确定树脂体系的固化反应为自催化反应,采用Sestak-Berggren双参数自催化动力学模型对其固化行为进行分析,发现模型曲线与实验曲线基本吻合。研究结果为快速RTM成型工艺参数的确定提供技术基础和理论依据。

This paper studies on the chemical rheological behavior and curing of epoxy resin in rapid RTM process. According to the rheological behavior, it is found that the resin molding window can be effectively predicted by Arrhenius viscosity-temperature equation. According to the curing behavior, analysis via the MalekFlynn-Wall-Ozawa method leads to a conclusion that resin curing process is an autocatalytic reaction. By employing Sestak-Berggren two-parameter autocatalytic model in curing analysis, it shows that the theoretical curve coincides well with the experimental data, which provides theoretical and technical support for the parameter optimization in rapid RTM process.