Morsy M A, Shwehdi M H
Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia.
Spectrochim Acta A Mol Biomol Spectrosc. 2006 Mar 1;63(3):624-30. doi: 10.1016/j.saa.2005.06.011. Epub 2005 Jul 18.
Electron spin resonance (ESR) study is carried out to characterize thermal endurance of insulating materials used in power cable industry. The presented work provides ESR investigation and evaluation of widely used cable insulation materials, namely polyvinyl chloride (PVC) and cross-linked polyethylene (XLPE). The results confirm the fact that PVC is rapidly degrades than XLPE. The study also indicates that colorants and cable's manufacturing processes enhance the thermal resistance of the PVC. It also verifies the powerfulness and the importance of the ESR-testing of insulation materials compared to other tests assumed by International Electrotechnical Commission (IEC) Standard 216-procedure, e.g. weight loss (WL), electric strength (ES) or tensile strength (TS). The estimated thermal endurance parameters by ESR-method show that the other standard methods overestimate these parameters and produce less accurate thermal life time curves of cable insulation materials.
开展电子自旋共振（ESR）研究以表征电力电缆行业中使用的绝缘材料的热耐久性。所呈现的工作提供了对广泛使用的电缆绝缘材料，即聚氯乙烯（PVC）和交联聚乙烯（XLPE）的ESR研究与评估。结果证实了PVC比XLPE降解更快这一事实。该研究还表明，着色剂和电缆制造工艺提高了PVC的热阻。它还验证了与国际电工委员会（IEC）标准216程序所采用的其他测试（例如重量损失（WL）、电气强度（ES）或拉伸强度（TS））相比，ESR测试绝缘材料的有效性和重要性。通过ESR方法估计的热耐久性参数表明，其他标准方法高估了这些参数，并且生成的电缆绝缘材料热寿命曲线准确性较低。
