Abstract

Results obtained on electrophysical phenomena occurring in polymers during friction tests carried out at high humidity, in liquids and vacuum, are described. The mechanism of formation of the polymer electret state is discussed for rubbing in high humidity conditions. It is shown that the electret state results from charge carrier injection following the mechanism of contact or electrolytic electrification. A set of electrophysical phenomena have been investigated during friction of polymers in liquids and vacuum. The effects of vacuum pressure, rubbing conditions and the electric conductivity of the liquids on the polymer electrification, and the rules of electret state formation have been analysed. The kinetics of polymer triboelectrification have been investigated. The experiments performed showed that the first inversion of the electrification current during polymer friction resulted from water desorption from the surface layer of the polymer.

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