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Effect of high temperature thermal treatment on dielectric relaxation of epoxy polymers
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Mingru LI1, Yang FENG1, Jianyu LANG1, Yafang GAO1, Kun WANG2, Yun CHEN2, Wei YANG2, Shengtao LI1
Insulating Materials | 2024, 57(3) : 65 - 71
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Insulating Materials | 2024, 57(3): 65-71
• Insulation Technology •
Effect of high temperature thermal treatment on dielectric relaxation of epoxy polymers
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Mingru LI1, Yang FENG1, Jianyu LANG1, Yafang GAO1, Kun WANG2, Yun CHEN2, Wei YANG2, Shengtao LI1
Affiliations
  • 1State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
  • 2State Grid Smart Research Institute Co., Ltd., Beijing 102211, China
Published: 2024-03-20 doi: 10.16790/j.cnki.1009-9239.im.2024.03.009
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In order to investigate the effect of thermal treatment on the dielectric relaxation of EP, a EP sample was prepared and conducted thermal treatment at 210℃/48 h. The changes of chemical structures, glass transition temperatures, thermal decomposition parameters, volume resistivities, and dielectric relaxation of the EP before and after thermal treatment were studied. The results show that the thermal treatment does not change the chemical structures and thermal decomposition temperatures of the EP, but the glass transition temperature decreases from 134℃ to 108℃. Furthermore, the dielectric constant of the sample increases after thermal treatment, with a smaller increase at high frequency (106 Hz) and a more significant increase at low frequency (10-1 Hz).

epoxy resin  /  thermal treatment  /  dielectric relaxation  /  thermal properties  /  dielectric constant
Mingru LI, Yang FENG, Jianyu LANG, Yafang GAO, Kun WANG, Yun CHEN, Wei YANG, Shengtao LI. Effect of high temperature thermal treatment on dielectric relaxation of epoxy polymers[J]. Insulating Materials, 2024 , 57 (3) : 65 -71 . DOI: 10.16790/j.cnki.1009-9239.im.2024.03.009
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.03.009
  • Receive Date：2023-02-26
  • Online Date：2025-12-22
  • Published：2024-03-20
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History
  • Received：2023-02-26
  • Revised：2023-04-06
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    1State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
    2State Grid Smart Research Institute Co., Ltd., Beijing 102211, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
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Percentage of
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Genus		 种数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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