高压电器2024，Vol.60Issue(5)：189-193,5.DOI:10.13296/j.1001-1609.hva.2024.05.024
SF6气氛下聚四氟乙烯的热解研究
Study on Pyrolysis of Polytetrafluoroethylene in SF6
摘要
Abstract
Partial over-heating inside the SF6 equipment will generate the decomposition product with perfluorocar-bon characteristic.For exploring the intrinsic relationship between the decomposition products of fluorocarbons and the thermal decomposition degradation process of PTFE,the synchronous differential scanning calorimetry(DSC)/thermogravimetry(TG)/gas chromatography(GC)joint technology is used to construct a thermal decomposition reac-tion model of sulfur hexafluoride(SF6)which can track the decomposition products of fluorocarbons.The pyrolysis heating rate/decomposition temperature/decomposition product content conditions are associated systematically with the characteristic decomposition products/insulating material erosion determined by experiments,and the chemical reaction history of the formed hexafluoroethane(HFE)and perfluoropropane due to thermal decomposition of SF6-PTFE in the temperature range of 500-600℃is clarified.The results can be directly applied to the qualitative and quantitative detection of thermal erosion of PTFE nozzle of circuit breaker and can provide an experimental and theoretical basis for accurate analysis of failure of nozzle.关键词
聚四氟乙烯/热分解/SF6分解产物/喷口侵蚀Key words
PTFE/pyrolysis/SF6 decomposition product/nozzle erosion引用本文复制引用
杨韧,郭萌,杨景慧,汪金星,张晓,张伟强..SF6气氛下聚四氟乙烯的热解研究[J].高压电器,2024,60(5):189-193,5.基金项目
国网陕西省电力公司科技项目资助项目(5226ky19004D). Project Supported by State Grid Shaanxi Electric Power Company Science and Technology Project(5226ky19004D). （5226ky19004D）
