MORPHOLOGICAL, PHYSICO-CHEMICAL FEATURES OF REPEATED PROCESSING OF POLYETHYLENE FILMS IN BARRIER DISCHARGE PLASMA
He regularities of the influence of repeated processing of polyethylene in the plasma of a barrier discharge at atmospheric pressure on the structural and morphological changes occurring in the surface layers have been established, and the high efficiency of its use has been determined in order to achieve a given activation effect. It has been established that during processing in the surface and near-surface layers, hydroxyl, carbonyl and carboxyl groups are formed, the content of which, as well as the value of surface energy, are highest after 4-times processing. It has been established with such processing modes, an increase in the sample roughness by a factor of 2.8 times, as well as an increase in the surface uniformity. It has been shown that with an increase in the processing frequency in layers with a thickness of up to 300-800 nm, a significant increase in nanohardness is observed, which is explained by an increase in the polarity of the surface layers and the occurrence of molecular cross-linking processes.