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首页> 外文期刊>Journal of Applied Polymer Science >Thermal decomposition kinetics of photooxidized nylon 66
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Thermal decomposition kinetics of photooxidized nylon 66

机译：光氧化尼龙66的热分解动力学

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摘要

The thermoanalytical method offers a convenient means for testing a starting material before the end application. Differences in the kinetic parameters between neat and irradiated nylon 66 samples were estimated in the temperature range of 25degreesC-800degreesC by thermogravimetric analysis (TGA) and in the range of 25degreesC-300degreesC by differential scanning calorimetry (DSC). Under nitrogen flux the average activation energy for decomposition was in the range of 12.2-26.9 kcal/mol for the neat sample and 15.7-33.1 kcal/mol for the irradiated sample (250 h). Activation energy is affected by the process of bond breaking at the C-N bonds, which is the rate-determining step of the decomposition in nylon 66. (C) 2003 Wiley Periodicals, Inc. [References: 24]
机译：热分析方法为在最终应用之前测试原材料提供了一种方便的方法。通过热重分析（TGA）在25°C-800°C的温度范围内和通过差示扫描量热法（DSC）在25°C-300°C的范围内估算纯尼龙和辐照尼龙66样品之间的动力学参数差异。在氮气流下，纯样品的平均分解活化能在12.2-26.9 kcal / mol的范围内，辐照样品（250 h）在15.7-33.1 kcal / mol的范围内。活化能受C-N键断裂的过程的影响，这是尼龙66中分解的速率决定步骤。（C）2003 Wiley Periodicals，Inc. [参考：24]

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