【摘要】 研究了 RTM专用双马来酰亚胺树脂体系的流变特性 ,并根据树脂不同温度下反应机理的不同 ,建立其分段粘度模型 ,粘度模拟结果与实验结果具有良好的一致性。所建立的粘度模型 ,可有效预测和模拟该树脂体系在不同工艺条件下的粘度行为 ,揭示了树脂体系的优化工艺参数和低粘度平台工艺窗口 ,为合理拟订RTM工艺参数和保证产品质量提供了必要的科学依据更多还原

【Abstract】 The rheological behaviors of bismaleimide resin (4503A) for resin transfer molding (RTM) are studied with DSC and viscosity experiments. A viscosity model is established and used to simulate rheological behaviors of the resin. It is shown that subsection viscosity models should be employed to describe the viscosity characteristics of the resin because of the different curing mechanisms of the resin at different temperatures. The estimated viscosity of the models is in good agreement with that of the experiments. The low viscosity plaque and a processing window of the resin are determined based on the developed models. The optimum processing parameter of the 4503A resin for RTM is 80℃ at which the viscosity of the resin will be less than 300cP within 71 minutes. The developed viscosity models will be important for processing simulation and quality control for high performance composites of RTM processing.更多还原