Abstract In energy application system, electrical energy is economic, practical, clean and easy to control and transfer. Electrical cables, especially high-voltage cables, have been extensively and increasingly applied in industries, and however their fire safety deserves more attention. Thermal behaviours of flame-retarded high-voltage Cable Sheath and Insulation were studied using SDT Q600 thermal analyser. The cable sheath pyrolysis profiles show three peaks while the insulation has only one peak. Possible reaction pathways and activation energy evolution with various conversion rates were analysed using both model-free and model-fitting methods. The zero order model and the 6th order model are responsible in two cable sheath pyrolysis stages, respectively. The one order model plays an important role in the pyrolysis of cable insulation. Evolved gas analysis by Fourier transform infrared spectroscopy (FTIR) shows that the amount of six main components produced in the order of most to least is CO2 > C H stretching > C H bending > C H aliphatic bending > CH2 deformation > C Cl stretching for the cable sheath while the relationship of C–H stretching > C H scissor vibration > CO2 > C O & C C stretching is determined for the cable insulation.

中文翻译：

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TG-FTIR 对阻燃高压电缆护套和绝缘的热降解

摘要 在能源应用系统中，电能具有经济、实用、清洁、易于控制和传输的特点。电力电缆，尤其是高压电缆，在工业中的应用越来越广泛，但其防火安全更值得关注。使用 SDT Q600 热分析仪研究了阻燃高压电缆护套和绝缘的热行为。电缆护套热解曲线显示三个峰，而绝缘层只有一个峰。使用无模型和模型拟合方法分析了具有各种转化率的可能的反应途径和活化能演化。零阶模型和六阶模型分别负责两个电缆护套热解阶段。一阶模型在电缆绝缘层的热解中起着重要作用。