This article presents the results of a study of the kinetics of curing an epoxy oligomer with an amine hardener by various methods. The methods presented in the work provide complete, or for a certain stage (rheokinetics, residual stresses) information about the kinetics of the polymerization process.

Data on the kinetics of the ED-20 + triethylenetetramine curing process obtained by different methods record changes in characteristics, however, they should be correctly interpreted and used in the development of various technological processes for creating materials and products.

The results of modification of a composite material based on a filled styrenic thermoplastic elastomer with maleinized polypropylene are presented. The dependence of strength, technological and operational properties of mixed compositions on temperature is shown. The results on the oxidative induction time of the developed compositions were obtained, which allowed us to conclude about the compatibilizing effect of maleinized polypropylene.

The microstructure of monolayer samples formed by 3D printing from composite prepregs reinforced with continuous carbon fiber, followed by treatment in a cured state by exposure to ultrasonic vibrations and a microwave electromagnetic field, has been studied. It has been shown that high-power ultrasonic exposure causes macro-changes, which are characterized by a decrease in the number and transverse dimensions of delaminations (cracks) from 0.05–0.1 mm to 0.01–0.02 mm and a decrease in the height of microrelief elements by almost an order of magnitude. Changes caused by exposure to a microwave electromagnetic field are more apparent when examining the end surface with an increase from ×1000 to ×10000. The control samples revealed fibers consolidated by binder in combination with unfilled gaps in a ratio of about 50:50, with individual globular fragments of frozen binder on their surface. The samples after microwave exposure revealed the presence of large areas without defects, completely uniformly filled with binder, fibers from all sides are in contact with the binder, in which there are voids no larger than 5 × 1.5μm in size. Greater orderliness of the structure of monolayers is most typical for samples with two-stage processing, including preliminary ultrasonic and subsequent.

The results of studying a polyfunctional heat-resistant composition based on oligodimethylsiloxane with terminal hydroxyl groups filled with boron nitride are presented. The influence of boron nitride on the physical-mechanical, thermophysical and electrical properties of the sealing composition is shown. The dependence of thermal conductivity coefficient, electrical resistivity and other characteristics on the content of the modifier has been established.

The oligotriglyceride of saccharin-6-carboxylic acid has been synthesized by transesterifi cation of alkyl esters of saccharin-6- carboxylic acid sulfonimide with an excess of 1,2,3-propanetriol. An epoxy composition with improved thermal, thermophysical and physical-mechanical properties was obtained on the basis of ED-20 epoxy resin and saccharin-6-carboxylic acid oligotriglyceride. The curing of the developed composition was studied by DTA and TGA methods.

The results of a study of the influence of a compatibilizer and basalt on the main physical and mechanical properties of composites based on high-density polyethylene are presented. The influence of sulfur and dicumyl peroxide on the regularity of change in strength parameters, heat resistance and melt flow index of dynamically vulcanized basalt plastics is shown.

The possibility of creating polymer compositions based on polyvinyl chloride plasticized with a bromine-containing flameretarding plasticizer has been investigated. Their thermostability at introduction of plasticizer with different bromine content was evaluated. The optimal concentrations of bromine in the flame-retarding plasticizer to increase the thermal stability of the polymer composition have been established. It is noted that increasing the concentration of bromine in the flame-retarding plasticizer increases the rate of elimination of hydrogen bromide and slows down the thermal destruction of the polymer matrix. It is shown that during thermo-oxidative degradation of plasticized PVC composite, hydrogen bromide is first eliminated from flame-retarding plasticizer, which accelerates the process of polyene formation and additional cross-linking of polymer macromolecules. An increase in the tensile strength of plasticized compositions at the introduction of optimal dosages of flame-retarding plasticizer was observed.

The results of an experimental study of the efficiency of electric pulse treatment of cured synthetic thermosetting resins based on an assessment of the level of water absorption are presented. An experimentally proven positive effect of reducing the water absorption capacity of the cured samples of the studied resins after their irradiation with nanosecond electromagnetic pulses. regardless of the period of exposure of samples in water. A rational mode of irradiation of cured resins with nanosecond electromagnetic pulses has been established, during the implementation of which, for all the resins under study, the maximum decrease in the water absorption index is observed.

This article describes an experimental setup for combining ultrafast on-chip calorimetry (nanocalorimetry) and Raman spectroscopy (Raman spectroscopy) to study phase transformations in polymer materials. A new method for calibration of a nanocalorimetric sensor under a laser beam of a Raman microscope for in situ measurements at various temperatures is developed.

The paper presents the results of development of conditions for obtaining hard polishing materials based on polyetherurethane solutions for chemical-mechanical planarization of semiconductor silicon wafers.

The article presents a comparison of different classes of flame retardants, the mechanisms of their action and their effect on the physico-chemical properties of polymer materials. Based on studies of the heat resistance of flame retardants, an optimal formulation for the manufacture of polymer cable channels has been proposed.

The problem of restoring the life cycle of polymers using the example of waste electronic and electrical equipment (WEEE) consists in carefully separating polymers by type and increasing the mechanical characteristics of polymers after their aging. It is shown that when separating polystyrene plastics based on impact-resistant polystyrene, the material also includes polyolefins, in particular, filled polypropylene. On this basis, a model system containing high-impact polystyrene and chalk-filled polypropylene was chosen. The effect of modifying additives such as SEBS, maleinated polystyrene and polypropylene on the physical and mechanical characteristics of impact-resistant polystyrene, including in the presence of filled polypropylene, has been studied. The influence of the composition of the composition on its thermal stability, as well as the thermal stability of industrial batches of secondary impact-resistant polystyrene from the WEEE has also been determined. As a result, using the example of a model system, ways of possible modifycation of the high-impact polystyrene from WEEE are shown in order to obtain a commercial product with improved characteristics.