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Effect of different accelerated ageing conditions on ageing behavior of nitrile rubber for 500 kV transformer
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Zhenlong WANG1, Changguo JI2, Zhewen HAN2, Lin LIN3, Zibo SONG2, Ju KANG1
Insulating Materials | 2025, 58(6) : 105 - 114
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Insulating Materials | 2025, 58(6): 105-114
• Insulation Technology •
Effect of different accelerated ageing conditions on ageing behavior of nitrile rubber for 500 kV transformer
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Zhenlong WANG1, Changguo JI2, Zhewen HAN2, Lin LIN3, Zibo SONG2, Ju KANG1
Affiliations
  • 1. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
  • 2. State Grid Jibei Electric Power Co., Ltd. Electric Power Research Institute, Beijing 100045, China
  • 3. State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
Published: 2025-06-20 doi: 10.16790/j.cnki.1009-9239.im.2025.06.013
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Under the high temperature conditions (90, 105, 120, and 135°C), accelerated ageing tests of nitrile rubber (NBR) were conducted in hot air, hot oil, hot air compression, and hot oil compression. The ageing mechanisms were investigated through Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA/DTG), and scanning electron microscopy (SEM), and the effects of ageing temperature, time, and deformation conditions on the ageing behavior of NBR were revealed. The results indicate that crosslinking, oxidation, and chain-breaking reactions occur during the ageing process of NBR, and the crosslinking reaction is the predominant reaction. After ageing at 120°C, grooves appear on the surface of NBR, and after ageing at 135°C, defects such as holes and damages appear on the surface. In the early stage of ageing, transformer oil has a suppressive effect on the increase of permanent deformation under compression. In the later stage of ageing, transformer oil plays a promote role for the decrease of tensile strength, and the higher the temperature, the more obvious the effect.

nitrile rubber  /  crosslinking reaction  /  transformer oil  /  high-temperature accelerated ageing  /  hot oil compression
Zhenlong WANG, Changguo JI, Zhewen HAN, Lin LIN, Zibo SONG, Ju KANG. Effect of different accelerated ageing conditions on ageing behavior of nitrile rubber for 500 kV transformer[J]. Insulating Materials, 2025 , 58 (6) : 105 -114 . DOI: 10.16790/j.cnki.1009-9239.im.2025.06.013
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doi: 10.16790/j.cnki.1009-9239.im.2025.06.013
  • Receive Date：2024-07-30
  • Online Date：2025-12-04
  • Published：2025-06-20
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  • Received：2024-07-30
  • Revised：2024-09-20
Funding
Affiliations
    1. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
    2. State Grid Jibei Electric Power Co., Ltd. Electric Power Research Institute, Beijing 100045, China
    3. State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2025.06.013
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
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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