ИСТИНА

Based on the analysis of the scientific literature, research directions were chosen related to the improvement of the electron-beam oxidation technology and the use of oxidized samples in the manufacture of composite materials. Methods and prototypes of equipment for the oxidation of plastic powders in water and aqueous solutions by means of a vertical or horizontal electron beam have been developed. Irradiation of plastic powders in water and aqueous solutions provides greater safety and controllability than irradiation in air. Moreover, an increase in the radiation-induced adhesion effect and an increase in the stability of the oxidized layer in aqueous systems with air bubbling has been shown. Irradiation of plastic powder in contact with water makes it possible to significantly increase the degree of oxidation of the surface of plastic particles due to the participation of radicals of water origin in reactions with surface macromolecules. High stability of the oxidized layer is achieved by irradiation in water containing formic acid. It is noted that the preparation of cement-plastic compositions should differ from the standard procedure for the preparation of cement-sand paste. The addition of plastic powder should be made to a thicker paste to prevent the plastic component from floating. Radiation-induced oxidation of the plastic surface sometimes results in the formation of acids or products that readily convert to acid when stored in air. Acids have a negative effect on the strength of cement-plastic and bitumen-plastic compositions. Therefore, electron beam oxidation must be carried out in conditions that prevent the formation of acids, or acidic products must be subjected to chemical neutralization.