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采用气相色谱定量测量了聚氯乙烯（ＰＶＣ）、乙丙橡胶（ＥＰＲ）和氯磺化聚乙烯 （ＣＳＭ）等线缆绝缘材料经辐照后在不同温度下热老化过程中的 Ｏ２消耗量。对实验数据进行了 反应动力学分析，发现线缆绝缘材料的热氧化降解反应为一级反应。同时获得了不同温度下的反 应常数，并与根据 Ａｒｒｈｅｎｉｕｓ方程计算的理论结果进行了比较。
Gas chromatography (GC) was used to quantitatively measure the O2 consumption during thermal aging of cable insulation materials (PVC, EPR and CSM) irradiated at different temperatures. The experimental data were analyzed by reaction kinetics and it was found that the thermal oxidative degradation of cable insulation material was a first order reaction. At the same time, the reaction constants at different temperatures were obtained and compared with the theoretical results calculated according to the Arrhenius equation.