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The hydrophobicity on surface of insulator material in outdoor is very important. In humid and the rainy conditions, the insulator surface must not easily wet, so that the surface conductivity of insulators remain low, thus the surface leakage current is very small. Therefore the polymeric insulator must be hydrophobic and withstand against environmental conditions. This paper presents the effect...
Under conditions of high temperature and high humidity, the moisture absorbing behavior of epoxy resin SUR-2 casting matrix for composite core was investigated, and the variation of the mechanical properties and the heat deformation temperature with hygrothermal aging were researched, The results show that the moisture-absorption behavior of the casting resin followed the Fick law. The mechanical...
In recent times, there has been increased awareness of the fact that space charge within an insulating material considerably governs its dielectric behaviour. In this work, we study the nature of space charge trapping and detrapping in epoxy specimens, with and without nano sized fillers. After application of a poling field for a specific period of time, depolarisation characteristics are obtained...
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