玻璃纤维/环氧树脂复合材料热分解动力学参数的确定
Determination of thermal decomposition kinetic parameters of glass-fiber/epoxy composite
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摘要: 采用热重分析仪对空气和氮气气氛中的玻璃纤维增强环氧树脂基复合材料进行热分析，得到该材料在空气气氛中的烧蚀热为3 125～3 440 J/g，而在氮气气氛中并未出现明显的氧化放热峰。基于阿伦纽斯形式的多步分解模型和直接解法，计算了该材料在空气气氛中的热分解动力学参数。分析表明：阿伦纽斯形式的多步分解模型能够较好地描述该材料的热分解过程；直接解法适用于计算复合材料的热分解动力学参数；确立的热分解动力学参数是正确有效的。Abstract: The thermal analysis of glass-fiber/epoxy composite has been carried out with a thermogravimetric analyzer in air and in nitrogen, respectively. The heat of ablation in air is 3 125 to 3 440 J/g, while no obvious oxidation exothermal peak appears in nitrogen. Thermal decomposition kinetic parameters of glass-fiber/epoxy composite are calculated based on the multi-step decomposing model of Arrhenius relation and the direct solution method. Analysis results indicate that, the multi-step decomposing model can reflect the process of thermal decomposition and the direct solution method is suitable for calculating thermal decomposition kinetic parameters of the composite. The obtained thermal decomposition kinetic parameters are valid.
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