【摘要】 通过DSC和黏度测量,研究了反应型固化剂DDS(二氨基二苯基砜)用量对双酚A环氧树脂体系黏度变化的影响规律。研究结果表明,流变特性与固化特性随固化剂用量的变化规律相似。DDS的用量在一定范围内对环氧树脂体系流变特性影响不大。建立了环氧树脂工程黏度模型,该模型能够有效的预测体系黏度变化的工艺窗口并进行黏度预报,为复合材料成型工艺的顺利实施以及工艺参数的科学制定提供基础。更多还原

【Abstract】 The effects of DDS curing agent ratio on the curing kinetic and viscosity of a DDS/bisphnol-A epoxy resin system are experimentally studied by DSC analysis and viscosity measurements. The results show that the DDS ratio has little effect on rheological behavior of resin system in a certain range. An engineering viscosity model is succefully developed to predict resin rheological behaviors of the resin system based on the viscosity measurement results and mechanisms of the curing reaction. The established model can be used to predict the processing windows of different viscosity requirements, which is critical for the simulation and optimization of composite manufacturing processes.更多还原