International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Are investigated mechanisms and kinetics of structural transformations polymeric substrates and of disperse particles fillers and modifiers exposed defocused laser radiation with energy in the range of 1.5 to 6 J. Installed effect of hardening the thermoplastic matrices (polyolefins, polyamides, of polyesters) when exposed to short laser pulses on a film sample thicknesses of 50-200 microns. The methods of structural analysis (IR spectroscopy, X-ray diffraction, DTA) showed, that the predominant mechanism of manifestation hardening effect is the formation of nano-sized structures in the film sample volume due to leakage of recrystallization processes. When exposed to laser radiation to disperse and fibrous particles of silicates, graphite, schungite, carbon fibers is implementing a complex effect of increasing the dispersion and the formation of advanced morphology of the surface layer with an increase in the proportion of nano-sized fragments whisker and lamellar habitus. When laser irradiation of fibers fragments formed developed morphology of the surface layer, due to the occurrence of thermal degradation processes that lead to the appearance of cracks and of globular indentations. Spectroscopy method of thermally stimulated currents (TSC – spectroscopy) established the effect of changing the energy state of the surface layers of substrates and particulate modifiers, which are characterized by extreme values of magnitude TSC – currents in the temperature range 193-523 K. The combined effect of energy and morphological factors provides the effect of increasing the activity of modifying components subjected to the laser processing. Changing the energy state of the surface layer of the polymer substrate has a beneficial bactericidal effect, increases the effectiveness of antiseptic treatment of medical devices used in medical practice. Are presented examples of the practical use of the established laws when creating polymer composites for metal-polymer systems for various applications.

The physicochemical and structural aspects of the modification of polymeric materials and fillers, laser exposure to a given intensity. Installed effects transform the morphology of the surface layers of dispersed, semi-finished fiber and membrane to form nano-sized components with increased vigour. Modification of certain process parameters laser that achieve predetermined functional characteristics. It sets the parameters of the effect of a significant increase of strength characteristics of film semi-finished products made of thermoplastic (HDPE, LDPE, PP, PA, PET, PTFE), due to the formation of spherulitic supramolecular structures. The energy parameters of the surface layers of composites, subjected to modification of a short-pulse laser exposure. Installed effect forming electrets structures and nano-relief, providing suppression of unfavorable biochemical processes in the application of products in practice. The results of the use of materials and products subjected to laser modification, engineering and medical practice.