【摘要】 本文对5228环氧树脂体系的化学流变特性进行研究。采用DSC热分析技术和粘度测量手段,研究该树脂体系固化特性和固化过程中粘度与温度的关系,根据对等温和动态粘度曲线的分析,建立了工程恒温粘度模型,通过积分变换将模型推广到非恒温条件下使用,验证了所建立的粘度模型在工程中的准确性。所建立的工程粘度模型能有效地预测体系热压工艺的粘度变化和工艺窗口,具有工程实用性,为复合材料成型工艺模拟分析及工艺参数的确定奠定了基础。更多还原

【Abstract】 The curing properties and rheological behaviors of 5228 resin system are studied by DSC analysis and viscometer measurements respectively.An engineering viscosity model is established to predict rheological(behaviors of the resin system.The results show that the model is suitable to predict the viscosity in the hot molding prcoess.The effectiveness of the engeering viscosity model is verified both in isothermal and non-isothermal conditions.The model can be used to predict the processing windows of different processing parameters of hot molding process,which is critical for the simulation and optimization of composite manufacturing processes.更多还原