Abstract In this study, thermal decomposition kinetics of poly(methylmethacrylate) (PMMA) is investigated in the presence of a phosphorus-based flame retardant (Exolit®) under slow and fast pyrolysis conditions. Multi-Gaussian distributed activation energy model (DAEM) is employed to determine the kinetic parameters at slow heating rates. The multi-Gaussian DAEM with five parallel independent reactions predicts well the experimental mass loss and differential mass loss profiles. The incorporation of 3 and 5 wt.% Exolit® in PMMA delays the decomposition temperature and slows down the rate of PMMA pyrolysis. Isothermal fast pyrolysis is carried out in the temperature range of 400−700 °C at short time intervals of 2−150 s. The rate constant of decomposition of PMMA + 5 wt.% Exolit® mixture was lower than that for pure PMMA. Through analytical pyrolysis coupled with Fourier transform infrared spectroscopy it is shown that the addition of Exolit® to PMMA significantly delays the evolution of methylmethacrylate, which is the major pyrolysate.

中文翻译：

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聚（甲基丙烯酸甲酯）-阻燃混合物缓慢和快速热解的详细动力学分析

摘要 在本研究中，研究了在缓慢和快速热解条件下，在磷基阻燃剂 (Exolit®) 存在下聚甲基丙烯酸甲酯 (PMMA) 的热分解动力学。采用多高斯分布活化能模型 (DAEM) 来确定缓慢加热速率下的动力学参数。具有五个平行独立反应的多高斯 DAEM 很好地预测了实验质量损失和微分质量损失曲线。在 PMMA 中加入 3 和 5 重量％的 Exolit® 会延迟分解温度并减慢 PMMA 热解的速度。等温快速热解在 400-700 °C 的温度范围内以 2-150 秒的短时间间隔进行。PMMA + 5 wt.% Exolit® 混合物的分解速率常数低于纯 PMMA。