Abstract
PTFE transferred layers were found to decrease or increase the friction force depending on variations in adhesional interaction on the contact area when the layer is being formed. The molecular component of adhesion is of great importance. After a layer of transferred PTFE has formed on the contacting surface, PTFE begins to wear by a thermoactivation mechanism with an activation energy of 40–60 kJ mol -1. These low values of activation energy indicate PTFE wear to be associated most of all with the breaking of weak intermolecular bonds and with interplanar shear and slipping of crystalline aggregates formed in the band structure of the material.
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