NDLI: Surface properties of cross-linked polyethylene

Content Provider	IEEE Xplore Digital Library
Author	Ashraf Khan, M. Hackam, R.
Copyright Year	1998
Description	Author affiliation: Dept. of Electr. Eng., Windsor Univ., Ont., Canada (Ashraf Khan, M.)
Abstract	This study reports on the loss of hydrophobicity of cross-linked polyethylene (XLPE) insulation. Specimens of steam cured XLPE cut from a nominal 28 kV/sub rms/ cable were immersed in saline solutions of varying conductivities from 5 to 10/sup 5/ /spl mu/S/cm over a wide range of temperatures from 0 to 98/spl deg/C. Specimens of XLPE were also left in air over the same temperature range. The hydrophobicity of the surface was determined by measuring the contact angle of a sessile drop of water. The contact angle decreased with increasing conductivity and increasing temperature of the saline solution. The time of immersion in the saline solution was extended up to 3,000 h until the reduced contact angle saturated at all the temperatures and all conductivities. The saturated values of the reduced contact angles and the time they took to reach it, depended on the temperature and the conductivity of the saline solution. In addition, the changes in the weight due to the uptake of water and the surface roughness of the XLPE specimens were determined during immersion. It will be shown that the decrease in the contact angle is related to the increased weight of the specimens and increased surface roughness.
Starting Page	673
Ending Page	677
File Size	453692
Page Count	5
File Format	PDF
ISBN	0780350359
DOI	10.1109/CEIDP.1998.732987
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polyethylene Conductivity Rough surfaces Surface roughness Temperature distribution Cables Surface contamination Insulation Goniometers Polymers
Content Type	Text
Resource Type	Article

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