| Effect of Insulating and Enviromental Gas C4F7N and CO2 on Aging Resistance of EPDM and NBR |
| Received:May 31, 2019 Revised:May 31, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.03.0177 |
| Key Words: EPDM；NBR；perfluoroisobutyronitrile；CO2；insulation；enviromental protection；mixed gas； aging resistance |
| Author Name | Affiliation | E-mail | | ZHANG Yaru | Electric Power Test and Research Institute,Guangzhou Power Supply Co.，Ltd | zhangyaru1989@163.com | | LIU Jing* | Electric Power Test and Research Institute,Guangzhou Power Supply Co.，Ltd | greengasguangzhou@163.com | | HUANG Qingdan | Electric Power Test and Research Institute,Guangzhou Power Supply Co.，Ltd | | | WANG Yong | Electric Power Test and Research Institute,Guangzhou Power Supply Co.，Ltd | | | ZENG Lian | Electric Power Test and Research Institute,Guangzhou Power Supply Co.，Ltd | |
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| Abstract: |
| The changes of chemical structure and physical properties of ethylene-propylene-diene rubber（EPDM） and nitrile rubber（NBR） aged in different atmosphere[air，carbon dioxide（CO24F7N）/CO24F7N] were investigated. The results showed that，the aging degree of EPDM and NBR were severe in air atmosphere aging condition，while the aging degree of EPDM was clearly lower than that of NBR in CO24F7N/CO24F7N atmosphere aging condition. CO24F7N showed less influence on the physical properties of EPDM，and had the better compatibility with EPDM. EPDM was suitable for the seals of electrical equipment using CO24F7N as insulating gas. |
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