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首页> 外文期刊>Journal of Materials Science >Curing characteristics of an epoxy resin in the presence of ball-milled graphite particles
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Curing characteristics of an epoxy resin in the presence of ball-milled graphite particles

机译：球磨石墨颗粒存在下环氧树脂的固化特性

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摘要

The effects of simply-made graphite particles (GPs, 1 wt%) on curing kinetics of an epoxy resin were investigated by means of differential scanning calorimetry (DSC). Two approaches based on constant and variable activation energy were applied to analyze the DSC curves. Results from the constant energy method showed that addition of the GPs increased the activation energy E (c) and the overall order of reaction m + n. With the variable energy method, the activation energy varied with curing conversion substantially in the GP/epoxy system; in contrast, the variation in the pure epoxy was very limited. The GPs also decreased the heat of reaction (Delta H) and increased the glass transition temperature (T (g)) for the epoxy. Comprehensive analyses indicated that the GPs did not significantly impede the curing reaction, which can enable improvement of the composite functionalities without creating processing penalties. The information obtained from this study provides an understanding of multiple factors involved in the complex relationship of structure and properties of the composites.
机译：通过差示扫描量热法（DSC）研究了简单制备的石墨颗粒（GPs，1wt％）对环氧树脂的固化动力学的影响。应用基于恒定和可变活化能的两种方法来分析DSC曲线。恒定能量方法的结果表明，添加GP会增加活化能E（c）和反应的整体顺序m + n。在可变能量方法中，GP /环氧树脂体系中的活化能随固化转化率的变化而变化。相反，纯环氧的变化非常有限。 GP还降低了环氧树脂的反应热（ΔH）并提高了玻璃化温度（T（g））。全面的分析表明，GP并没有显着阻碍固化反应，这可以提高复合材料的功能性，而不会产生工艺上的损失。从这项研究中获得的信息提供了对复合材料结构与性能复杂关系中涉及的多个因素的理解。

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