Surface studies of corona-treated silicone rubber high-voltage insulation

XPS (X-ray photoelectron spectroscopy) and microscopy studies of the brittle layer that is produced have established that corona exposure forms a wettable silica-like layer on the surface of most polydimethylsiloxane (PDMS) elastomers. This is consistent with similar effects from oxygen and inert ga...

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Published in[Proceedings] 1992 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena pp. 829 - 836
Main Authors Smith, P.J., Owen, M.J., Holm, P.H., Toskey, G.A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1992
Subjects
Chemicals
Corona
Oxidation
Photoelectron microscopy
Plasma materials processing
Plasma x-ray sources
Rubber
Silicon
Spectroscopy
Surface treatment
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Summary:XPS (X-ray photoelectron spectroscopy) and microscopy studies of the brittle layer that is produced have established that corona exposure forms a wettable silica-like layer on the surface of most polydimethylsiloxane (PDMS) elastomers. This is consistent with similar effects from oxygen and inert gas plasma treatment. Such a layer cannot readily reorient between hydrophilic and hydrophobic states at the surface, suggesting that diffusion of low molecular weight PDMS components is an important mechanism of hydrophobic recovery. The recovery is followed by water contact changes which show differences between conventional peroxide-cured and platinum-cured silicone elastomeric materials. These latter materials recover more slowly. XPS chemical shift data also indicate interesting oxidation differences in silicon and carbon in the surface of these two classes of elastomers.< >
ISBN:9780780305656
0780305655
DOI:10.1109/CEIDP.1992.283194