EPON862环氧树脂体系化学流变特性研究

STUDIES ON RHEOLOGICAL BEHAVIORS OF EPON862 EPOXY RESIN SYSTEM FOR RESIN TRANSFER MOLDING

对用于 RTM工艺的 EPON86 2环氧树脂体系的化学流变特性进行研究 ,并根据双阿累尼乌斯方程 ,建立树脂体系的流变模型。粘度模型与实验结果具有良好的一致性。模型可揭示树脂体系在不同工艺条件下的粘度行为 ,定量预报 RTM工艺树脂的低粘度平台工艺窗口 ,为合理制定 RTM工艺参数。

In this paper, the rheological behavior of epoxy resin (EPON862) for resin transfer molding (RTM) was studied with DSC analysis and viscosity experiments. A rheological model based on dual Arrhenius equation was established and used to simulate rheological behavior of the resin. The estimated viscosity of the model was in good agreement with that of the experiments. The processing window of the resin system can be well determined for the process based on the developed model. It is shown that the optimum processing temperature of the EPON862 resin for RTM process is 50℃, at which the resin can keep the viscosity less than 300 cP for 50 min. The rheological model is important for processing simulation and quality control of RTM processing for high performance composites.