Rezumat
The change of the charge state and thickness of the polymer layer in polyethylene with piezoceramic of diffe- rent structure after electric treatment has been investigated. It is shown that difference in strength properties of piezo- composition with various sizes of particles, as a function of the strength of electric treatment, is related to the change in the specific surface of the polymeric layer. There is an increase of the fraction of the interphase layer of the polymer matrix, at the same volume percentage of piezoceramics, with the decrease in sizes of piezoceramics particles. It leads to an increase in the interphase interaction between components of the composition.