C4F7N/CO2/O2与三元乙丙橡胶的相容性及相互作用机理研究

doi:10.19595/j.cnki.1000-6753.tces.201700

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Abstract C₄F₇N mixed gases have attracted much attention in recent years due to their excellent electrical properties and low global warming potential value. However, the compatibility of C₄F₇N and its gas mixture with the internal sealing materials of gas insulated equipment still needs to be tested before it is put into field application. At present, there have been some studies on the compatibility of C₄F₇N with EPDM, but few of them focus on the compatibility comparison between C₄F₇N gas mixtures and EPDM with different third monomers and the mechanism of gas-solid interaction. In this paper, ENB-EPDM and DCPD-EPDM were selected and the compatibility experiment was carried out with C₄F₇N/CO₂/O₂ mixed gases. The results reveal that some active structures in EPDM reacted with the CN group of C₄F₇N. The contact between gas and rubber surface could be effectively blocked by coating silicone grease, and the decomposition of C₄F₇N was reduced. In addition, after comparing the experimental results of the two kinds of rubber, it is found that ENB-EPDM is more suitable for sealing C₄F₇N gas mixture than DCPD-EPDM, the difference is due to the different crosslinking efficiency provided by the two third monomers.

Key words： Eco-friendly insulating gas C₄F₇N/CO₂/O₂ EPDM compatibility

Received: 28 December 2020

PACS:

TM213

Fund:国家自然科学基金资助项目（51977159）

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	Wu Peng
	Ye Fanchao
	Li Yi
	Tang Ju
	Xiao Song
	Zhang Xiaoxing

Cite this article:

Wu Peng,Ye Fanchao,Li Yi等. Compatibility and Interaction Mechanism between C₄F₇N/CO₂/O₂ and EPDM[J]. Transactions of China Electrotechnical Society, 2022, 37(13): 3393-3403.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201700 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I13/3393

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