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Improved flashover performance and tracking resistance of silicone rubber by direct fluorination
Author(s) -
An Zhenlian,
Shen Ruochen,
Gao Wenjian,
Gu Xiaoxiao,
Chen Weijun,
Yang Long,
Yang Wei,
Zhang Zhuo
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48556
Subject(s) - silicone rubber , materials science , arc flash , attenuated total reflection , composite material , scanning electron microscope , x ray photoelectron spectroscopy , infrared spectroscopy , chemical engineering , chemistry , insulator (electricity) , organic chemistry , engineering
Silicone rubber (SIR) samples are fluorinated using a F 2 /N 2 mixture at different temperatures. Physicochemical characteristics are analyzed by attenuated total reflection infrared spectroscopy, X‐ray photoelectron spectroscopy, and scanning electron microscopy. Basic properties of the fluorinated surface layers are investigated, and the intrinsic alternating current (AC) flashover performance and tracking resistance of the surface fluorinated samples are evaluated. The flashover test results indicate that the fluorination leads to an improvement in AC flashover performance of the SIR material, as a result of the competition between the favorable effect of the increase in surface conduction and the adverse effect of a likely increase in surface layer permittivity. The increase in AC flashover voltage is associated with the voltage‐increasing mode of the flashover test. The flashover test results also show an improved tracking resistance of the SIR material by the fluorination, and the improvement is especially significant for the fluorinated surface layer that has less cleavage of SiC bonds or a good compactness as well as a large thickness. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48556.