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首页> 外文期刊>Journal of Applied Polymer Science >Effects of hygrothermal aging on the thermomechanical properties of a carbon fiber reinforced epoxy sheet molding compound: An experimental research
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Effects of hygrothermal aging on the thermomechanical properties of a carbon fiber reinforced epoxy sheet molding compound: An experimental research

机译：湿热老化对碳纤维增强环氧树脂片成型化合物热机械性能的影响：实验研究

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摘要

Carbon fiber sheet molding compounds (C-SMCs) are discontinuous fiber reinforced composite materials. Among them, epoxy-based C-SMCs are becoming relevant materials due to their high thermomechanical performance and better formability than continuous fiber reinforced composites. The thermomechanical performance of epoxy resins and epoxy based continuous carbon fiber composites have shown to be influenced by hygrothermal aging. In this work, this influence is studied for an epoxy-based C-SMC. Epoxy-based C-SMC samples were hygrothermally aged by means of accelerated conditioning, exposing them to 65% relative humidity, and 80 degrees C in a climatic chamber. The equilibrium moisture content, as well as the moisture diffusion coefficient has been determined. The thermomechanical properties of epoxy C-SMC have been analyzed by dynamic mechanical analysis, tensile, 3-point bending, and short beam tests in dry and aged samples. The results showed that epoxy C-SMC is affected by hygrothermal aging in the cases of moisture intake and its effects onT(g)value, but interestingly, the hygrothermal aging did not generate any degradation effects in the mechanical response of epoxy C-SMC.
机译：碳纤维片状模塑料（C-SMC）是一种不连续的纤维增强复合材料。其中，环氧基C-SMC由于其较高的热机械性能和比连续纤维增强复合材料更好的成形性而成为相关材料。环氧树脂和环氧基连续碳纤维复合材料的热机械性能受湿热老化的影响。在这项工作中，我们研究了环氧基C-SMC的这种影响。环氧基C-SMC样品通过加速处理进行湿热老化，将其暴露在65%的相对湿度和80℃的气候室中。确定了平衡含水量和水分扩散系数。通过动态力学分析、拉伸、三点弯曲和短梁试验，在干燥和老化样品中分析了环氧C-SMC的热机械性能。结果表明，在吸湿的情况下，环氧C-SMC受到湿热老化的影响及其对（g）值的影响，但有趣的是，湿热老化并未对环氧C-SMC的机械响应产生任何降解效应。

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