热老化对交联聚乙烯电缆绝缘理化结构的影响

绝缘材料, 2013, (2): 33-37.

热老化对交联聚乙烯电缆绝缘理化结构的影响

徐俊 ^1, , 王晓东 ^2, , 欧阳本红 ^3, , 李巍巍 ^4, , 景钰 ^5, , 李欢 ^6, , 李建英 ^7,

1.上海市电力公司，上海 200233

2.上海市电力公司，上海 200233

3.中国电力科学研究院，武汉 430074

4.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

5.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

6.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

7.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

关键词：交联聚乙烯 , 热老化 , 理化结构

Effect of Thermal Aging on the Physicochemical Structure of XLPE Cable Insulation

Xu Jun ^1, , Wang Xiaodong ^2, , Ouyang Benhong ^3, , Li Weiwei ^4, , Jing Yu ^5, , Li Huan ^6, , Li Jianying ^7,

1.上海市电力公司，上海 200233

2.上海市电力公司，上海 200233

3.中国电力科学研究院，武汉 430074

4.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

5.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

6.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

7.西安交通大学电力设备电气绝缘国家重点实验室，西安 710049

Keywords： XLPE cable , thermal aging , physicochemical structure

按照XLPE电缆热老化过程中绝缘材料理化结构的变化规律，对不同老化程度的电缆绝缘材料的热裂解活化能、结晶形态、分子结构进行分析。结果表明：不同温度热老化过程中羰基指数均随着老化时间的增加而增大；低温热老化有利于XLPE结晶形态的完善，XLPE活化能有所升高，高温热老化对XLPE结晶形态有显著的破坏作用，XLPE活化能成指数规律下降。电缆绝缘材料在热老化热裂解的同时也发生后交联，低温热老化电缆绝缘材料后交联作用占主导地位，而高温热老化电缆绝缘材料热裂解为主要因素。

参考文献

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