通过热重分析（TGA）研究硅橡胶绝缘子（SiR）在氮气（N₂）和空气环境中的热解动力学。将3种不同的等转化模型Flynn-Wall-Ozawa（FWO）、Kissinger-Akahira-Sunose（KAS）和Friedman（FR）方法应用于TGA结果分析，以计算活化能和指数前因子。在N₂气氛下采用FWO、KAS和FR方法计算的平均活化能分别为421.46、431.60、433.98 kJ/mol，指数前因子范围为10⁹~10¹⁶，热解与表面积无关。在空气气氛下采用FWO、KAS和FR方法计算的平均活化能分别为127.21、120.93、123.38 kJ/mol，指前因子范围为10⁸~10⁹，热解受表面积控制。在N₂气氛下，反应的热力学性质，如焓变（ΔH）、吉布斯自由能（ΔG）和熵变（ΔS）远高于空气气氛，证实了N₂气氛下反应的复杂性。研究结果有助于加深对SiR燃烧机理的理解，并为其作为一种更有效的耐高温材料的可行性研究提供参考。

The pyrolysis kinetics of silicone rubber insulators (SiR) in nitrogen (N₂) and air environments were studied by thermogravimetric analysis (TGA). Three transformation models, Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Friedman (FR) methods, were applied to calculate activation energy and pre-exponential factors. The average activation energies of FWO, KAS, and FR methods under N₂ atmosphereare were 421.46, 431.60, 433.98 kJ/mol, respectively. The pre-exponential factor ranged from 10⁹ to 10¹⁶, which illustrated that the pyrolysis was independent of surface area. Under the air atmosphere, the average activation energies of FWO, KAS, and FR methods were 127.21, 120.93, 123.38 kJ/mol, respectively. The value of pre-exponential factor ranged from 10⁸ to 10⁹, and pyrolysis was controlled by surface area. The thermodynamic properties of the reaction under N₂ atmosphere, such as enthalpy changes (ΔH), Gibbs free energy (ΔG) and entropy change (ΔS) were much higher than that under air atmosphere, confirming the complexity of the reaction in N₂. The results of the study contribute to a deeper understanding of the combustion mechanism of SiR and provide a reference for its feasibility as a more effective high-temperature resistant material.