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Mechanical properties research and service life prediction of nitrile rubber in thermal air ageing and oil ageing
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Zhewen HAN1, Changguo JI1, Lin LIN2, Zhenlong WANG3, Zibo SONG1, Juan LIU4, Ju KANG3, 5
Insulating Materials | 2024, 57(12) : 66 - 73
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Insulating Materials | 2024, 57(12): 66-73
• Insulation Technology •
Mechanical properties research and service life prediction of nitrile rubber in thermal air ageing and oil ageing
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Zhewen HAN1, Changguo JI1, Lin LIN2, Zhenlong WANG3, Zibo SONG1, Juan LIU4, Ju KANG3, 5
Affiliations
  • 1Electric Power Research Institute of State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
  • 2State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
  • 3School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
  • 4Xi′an Dayou Testing Technology Co., Ltd., Xi′an 710018, China
  • 5State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
Published: 2024-12-20 doi: 10.16790/j.cnki.1009-9239.im.2024.12.009
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In order to explore the ageing resistance of nitrile rubber products, such as high-temperature resistance, transformer oil resistance, and heat-compression resistance, we conducted accelerated ageing tests on nitrile rubber (NBR) under high temperature conditions of 90, 120, and 135℃ in hot air, hot oil, hot air compression, and hot oil compression, respectively. The effects of ageing temperature, ageing time, and ageing environment on the mechanical properties of NBR were researched, and compression set was used as an evaluation index to predict the actual service life of NBR. The results show that the ageing rate of NBR increases with the increase of temperature. During the ageing process, with the increase of ageing time, the Shore hardness and compression set of NBR increase, while the elongation at break decreases. 25# transformer oil can slow down the decrease in Shore hardness and compression set performance of NBR, while it slows down the decrease at first and then accelerates the decrease in fracture elongation. Based on the Arrhenius law, the predicted service life of NBR in hot oil compression environment at temperatures of 40, 50, 60, 70, and 80℃ is 3.726, 1.877, 0.985, 0.542, and 0.303 years, respectively.

nitrile rubber  /  accelerated ageing  /  thermal oil compression  /  compression set  /  life prediction
Zhewen HAN, Changguo JI, Lin LIN, Zhenlong WANG, Zibo SONG, Juan LIU, Ju KANG. Mechanical properties research and service life prediction of nitrile rubber in thermal air ageing and oil ageing[J]. Insulating Materials, 2024 , 57 (12) : 66 -73 . DOI: 10.16790/j.cnki.1009-9239.im.2024.12.009
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Year 2024 volume 57 Issue 12
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.12.009
  • Receive Date：2023-12-13
  • Online Date：2025-12-24
  • Published：2024-12-20
Article Data
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History
  • Received：2023-12-13
  • Revised：2024-02-21
Funding
Affiliations
    1Electric Power Research Institute of State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
    2State Grid Jibei Electric Power Co., Ltd., Beijing 100045, China
    3School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
    4Xi′an Dayou Testing Technology Co., Ltd., Xi′an 710018, China
    5State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
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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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