The thermal decomposition of post-consumer samples of a carbonated water bottle made of poly(ethylene terephthalate), PC-PET, was examined by linear temperature programing under an argon atmosphere to determine its mass loss kinetics. A simple kinetic model, called the first order pseudo single-component model, was used. The total weight-loss of each sample assumed to be in two periods, with each period corresponding to a one step decomposition of the PC-PET to volatiles. Three methods for determining the kinetic parameters by thermal gravimetric analysis were examined: differential analysis at a constant heating rate (differential), temperatures of a given conversion at a number of heating rates (isoconversional), and the maximum rate at multiple heating rates (peak temperature). The latter two multiple heating rates methods results were comparable to each other but they were not in agreement with the results from the differential method. The results of the differential method were insensitive to the heating rate and consistent with kinetics data reported in the literature for PET.

在氩气气氛下通过线性温度程序检查了由聚对苯二甲酸乙二醇酯制成的碳酸水瓶的消费后样品的热分解PC-PET，以确定其质量损失动力学。使用了一个简单的动力学模型，称为一阶伪单组分模型。每个样品的总重量损失假定为两个周期，每个周期对应于PC-PET一步分解为挥发物的过程。研究了通过热重分析确定动力学参数的三种方法：在恒定加热速率（差）下的差异分析，在多个加热速率下（等转化）的给定转化温度以及在多个加热速率下的最大转化率（峰值）温度）。后两种多重加热速率方法的结果彼此可比，但与微分方法的结果不一致。微分法的结果对加热速率不敏感，并且与PET文献中报道的动力学数据一致。