Abstract This work investigated kinetics and thermal degradation of acrylonitrile butadiene styrene and polycarbonate (ABS/PC) blend using thermogravimetric analysis in the range of 25 to 520°C. For thermal degradation of blend, activation energy (Ea) and pre-exponential factor (A) were calculated under various heating rates as 5, 10, 15 and 20°C/min using iso-conversional model-free methods (Kissinger, Flynn-Wall- Ozawa and Friedman). Mass loss of the blend as a function of temperature was plotted as thermogravimetric curve (TG) while derivative values of mass loss were drawn as derivative thermogravimetric (DTG) curve. Using Kissinger method, Ea was 51.4 kJ/mol, while values calculated from FWO and Friedman method were 86–161 and 30–251 kJ/mol respectively. Results showed increasing trend of Ea with higher conversion values indicating different degradation mechanisms at the initial and final stages of the experiment. Thermodynamic parameters such as enthalpy change (ΔH), Gibbs free energy (ΔG) and entropy change (ΔS) were also calculated.

中文翻译：

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ABS/PC共混物的热降解行为和动力学研究

摘要 这项工作使用热重分析在 25 至 520°C 范围内研究了丙烯腈丁二烯苯乙烯和聚碳酸酯 (ABS/PC) 共混物的动力学和热降解。对于混合物的热降解，使用等转换无模型方法（Kissinger，Flynn-沃尔-小泽和弗里德曼）。作为温度函数的共混物质量损失绘制为热重曲线 (TG)，而质量损失的导数值绘制为导数热重 (DTG) 曲线。使用 Kissinger 方法，Ea 为 51.4 kJ/mol，而 FWO 和 Friedman 方法计算的值分别为 86-161 和 30-251 kJ/mol。结果显示 Ea 有增加的趋势，转化值越高，表明实验初始和最后阶段的降解机制不同。还计算了热力学参数，例如焓变 (ΔH)、吉布斯自由能 (ΔG) 和熵变 (ΔS)。