The resistance of high-modulus polymer films to repeated bending has been studied. The coefficient of strength retention during tensile testing of fi lms after repeated bending with a constant number of load application cycles, including when changing the bending angle and the load applied during bending, was chosen as a criterion for resistance to deformation loads. It is shown that the bending angle and the applied load have a significant effect on the change in the deformation and strength properties of fi lms. Biaxially oriented PET (BOPET) fi lms were found to be the most resistant to repeated bending. Amorphous APET and PET-GAG fi lms demonstrated low bending resistance and were brittle in the selected conditions. A comparison of the resistance to repeated bending of general-purpose films and original drum membranes showed a slight decrease in strength properties. Non-oriented PA6 films showed a signifi cant drop in deformation-strength properties, and a combined material of biaxially oriented PA6 film with nylon fabric showed a slight decrease in properties after bending.

The paper deals with fundamental regularities of constructing a heterogeneous structure of filler with different types of lattices and structures for creating disperse-filled polymer composite materials (DFPCM) with specified properties. For the first time, the basic principles of designing DFPCM compositions with a given type of heterogeneous structure of dispersed filler (lattice) are presented at the quantitative level. It is shown that the design of all DFPCM compositions should start with the most dense packing of the filler in space, which is determined experimentally for dispersed fillers according to the proposed methods, as well as with the maximum coordination number Z equal to 8 (cubic lattice), with its subsequent reduction from 8 to 1 (eight steps). This approach opens up new possibilities for digitalization of the construction of different types of DFPCM structures with a set of specifed technological and operational.

The study presents the results of assessing the effect of material flow compensation factor and fiber placement during FDM printing using continuous carbon fiber impregnated with PA-6 thermoplastic melt on the physical and mechanical properties of printed composites. The influence of the laid structures of continuous carbon fiber and the hardness of the fi lament material on interlayer adhesion under shear loading and tearing conditions has been established. The obtained data were used for simulations using the APM FEM software to estimate the von Mises equivalent stress. The results show that increasing the material flow compensation factor when printing a layer on the fiber surface to 105% can improve the bond strength of carbon fiber with thermoplastic polyurethane.

By the reaction of sodium diethyldithiocarbamate trihydrate with 4-chlorobutylcarboxylatesin an aqueous medium (under green organic synthesis conditions), the corresponding acyloxybutylesters of N,N-diethyldithiocarbamicacid have been synthesized. Their influence on the physical-mechanical properties and thermal stability of flexible polyvinyl chloride has been investigated.

In this work, we solve the scientific and applied problem of creating a technology for the pilot industrial production of a cyanate ester binder based on 2,2-bis(4-cyanatophenyl) propane and carbon cyanate ester prepregs for the creation of aerospace PCMs.

Glycidyloxycarbonyl and glycidyloxymethylcyclopropylvinyl ethers have been synthesized and tested as diluents and antimicrobial modifiers for ED-20 epoxy resin. The synthesized ethers are well compatible with ED-20 resin, and their introduction into the resin in an amount of 5–20 mass.% causes a considerable decrease in the viscosity of the system. The strength and thermal properties of maleic anhydride-cured compositions containing synthesized esters were studied. An increase of heat resistance and strength properties of the compositions has been revealed.

Composites based on polypropylene and lactate-modified N,N-diallylacrylamide montmorillonite were obtained by melt blending. The structure of the obtained composites was investigated using X-ray diffraction analysis and scanning electron microscopy. It is shown that the elastic modulus, impact toughness and yield strength of the composites are improved compared to unfi lled polypropylene.

The industrial polyurethane/polyurea coatings recommended as anticorrosive materials for application in Gazprom were modified with carbon nanofillers, including fullerene C60, fullerene soot, and a batch of detonation nanodiamond. The kinetics of curing of the modified coatings, their mechanical and anticorrosive characteristics, as well as water absorption, were studied. It was shown that the incorporation of carbon nanosized fillers significantly improves the performance characteristics of polyurethane/ polyuria anticorrosive coatings.

The effect of processing modes of non-woven needle-punched fabric based on a mixture of polyethylene terephthalate and bicomponent fibers in a ratio of 70/30 wt.% on the hardness of materials intended for polishing polymers, glass and ceramics was studied. The fabric was processed on a special device, in which thermomechanical effect on the fabric is achieved in the gap between the heated roll and the conveyor belt with regulation of the heating thickness and obtaining materials with a gradient of fiber packing density by thickness. A model is proposed to predict the hardness of materials obtained by varying the processing speed and roll temperature. A relationship between the structure of the fabric and processed materials and their hardness is established.

During operation, polymeric materials are exposed to various aggressive factors, such as light, heat, oxygen, pressure and others. Oxidation processes can have a negative impact on the properties of blends. Degradation by thermal oxidation are important factors affecting the material during molding, chemical processing and disposal consideration. Analysis of the effect of secondary low density polyethylene on the behavior of polyethylene-polylactide blends during thermooxidative degradation showed that the additive accelerates the onset of oxidation both at 80°C and at 90°С. It was found by DSC method that after the thermo-oxidation process the glass transition peak of polylactide in the mixture becomes faint, and also the thermophysical characteristics of 30 PLA/60 LDPE/10 LDPEsec mixture components increase.

The article presents a new method for molding products from epoxy resin. The technical problem to be solved by the invention developed by the authors of the article is to reduce the duration of the product formation cycle. In this work, the problem is solved by nanopulse treatment of epoxy resin during the curing process.