Abstract The thermal behavior and pyrolytic degradation kinetics of main engineering polymers, high impact polystyrene (HIPS), acrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC) and their blends with polypropylene (PP) and poly(vinyl chloride) (PVC), representing typical plastic parts of waste electrical and electronic equipment (WEEE) were studied. Thermogravimetry (TG) pyrolysis experiments revealed that the thermal degradation of HIPS and PC occurred in a single step, whereas that of ABS and both blends underwent a two-consecutive, partially overlapping degradation steps, whose peaks related to the first-order derivative of TG were deconvoluted into two distinct processes. The first blend (HIPS, ABS, PC, PP) showed a thermal degradation reliance of the single polymer components, whereas this was not observed in the second blend (HIPS, ABS, PC, PP, PVC) investigated. A kinetic analysis was made using either the integral isoconversional method of Kissinger-Akahira-Sunose (KAS) or the differential Friedman method. Both blends exhibit low activation energies in the first degradation step (near 90 kJ/mol) whereas much higher (in the vicinity of 200 kJ/mol) in the second.

中文翻译：

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HIPS、ABS、PC 及其与 PP 和 PVC 共混物的热解降解动力学

摘要 主要工程聚合物、高抗冲聚苯乙烯 (HIPS)、丙烯腈-丁二烯-苯乙烯 (ABS) 和聚碳酸酯 (PC) 及其与聚丙烯 (PP) 和聚氯乙烯 (PVC) 的共混物的热行为和热解降解动力学, 代表了废弃电子电气设备 (WEEE) 的典型塑料部件进行了研究。热重 (TG) 热解实验表明 HIPS 和 PC 的热降解发生在一个步骤中，而 ABS 和两种共混物的热降解经历了两个连续的、部分重叠的降解步骤，其峰值与 TG 的一阶导数有关被解卷积为两个不同的过程。第一种共混物（HIPS、ABS、PC、PP）表现出对单一聚合物组分的热降解依赖性，而在第二种共混物（HIPS、ABS、PC、PP、PVC）进行了调查。使用 Kissinger-Akahira-Sunose (KAS) 的积分等转化方法或微分 Friedman 方法进行动力学分析。两种混合物在第一个降解步骤中都表现出低活化能（接近 90 kJ/mol），而在第二个降解步骤中则高得多（接近 200 kJ/mol）。