气相色谱法研究核电站用电线电缆绝缘材料的热氧化降解

STUDY ON THERMAL OXIDATIVE DEGRADATION OF CABLE INSULATION MATERIALS USED IN NUCLEAR POWER PLANTS BY GAS CHROMATOGRAPHY

测量了聚乙烯（ＰＥ）、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热老化过程中的Ｏ２消耗量与ＣＯ２生成量，发现ＣＯ２生成量随Ｏ２消耗量呈线性增加。计算了氧化降解反应的表观活化能，探讨了氧化降解的反应机理。

Oxygen consumption and carbon dioxide evolution for EPR, PE, PVC and CSM as the cable insulation materials after irradiation and thermal aging were measured by using gas chromatograph in order to study the lifetime prediction. CO 2 evolution increases linearly with O 2 consumption. The apparent activation energy for these materials varies between 68kJ/mol and 133kJ/mol. Reaction mechanism was discussed.