A study on the effect of the structure of disperse-filled polymer composite materials (DFPCM) based on EVA grade 11306-075 and rice straw powder (RSP) with a particle diameter of 250 μm on the complex of rheological properties has been carried out.

For the first time, a quantitative relationship of generalized parameters, type of structure and lattices with the rheological properties of dispersed systems based on EVA + RSP has been determined. It has been established that during the processing of DFPCM with the DS, LFS, and MFS-1 structure types by traditional methods (extrusion, injection molding, etc.), there are practically no technological difficulties. Systems with the type of structure MFS-2 and HFS have an increased viscosity (~7–15 times) in comparison with unfilled EVA; therefore, they cannot be processed.

The results of the experiments and the approach developed in this work makes it possible to design DFPCM compositions with adjustable structural parameters and a set of properties, as well as to choose methods and technological parameters for processing them into products with a given shape, configuration, and dimensions.

The results of investigation of dependence of physical and mechanical characteristics of disperse-filled polymer composite materials (DFPCM) based on EVA grade 11306-075 and rice straw powder with particle size of ~ 250 microns (RSP) on generalized parameters of their structure are presented. The calculation of the generalized parameters and the classification of DFPCM according to the type of structures were carried out.

It has been shown that when filling EVA grade 11306–075 with RSP particles, depending on the type of structure, the tensile strength of DFPCM decreases by ~ 2 times (from 9.4 to 4.51 MPa), the tensile strain by more than ~ 10 times (from 275 up to 8%), and the value of the tensile modulus increases by ~ 18 times (from 42 to 750 MPa).

To obtain DFPCM based on EVA filled with rice straw powder with optimal physical and mechanical properties, it is recommended to introduce RSP in the concentration range from 0.18 to 0.45 vol.p.

The article presents the results of a study of the addition of high-viscosity unimodal HDPE on the complex of physicochemical, rheological and strength properties of PE100. The analysis of thermal properties according to TGA/DTA data as well as the results of studying the composition of volatile products, and the molecular weight characteristics of individual components and blends are presented. The conducted studies have shown that the introduction of high-viscosity unimodal HDPE into bimodal PE100 makes it possible to control the rheological characteristics of the material, shifting the “melt breakdown” to the area of high shear rates, i.e. to increase the processability of the original PE 100, and expand the processing range, which may be useful in the production of extruded sheets and profile products. At the same time, the strength characteristics of the finished product will remain at the level of PE100.

The features of the production process of polymeric foams based on polyvinyl chloride and reactive isocyanates in the presence of carboxylic acid anhydrides as crosslinking agents are investigated. The infl uence of the nature of isocyanates and their concentration on the formation of imide fragments in the polymer matrix, on the physical-mechanical and temperature-deformation properties of foams is shown. The glass transition temperatures of the obtained materials are determined.

The effect of antifriction additives on the process of ε-caprolactam anionic polymerization and on the properties of the synthesized samples has been studied. Motor oil, vacuum oil, household lubricating oil and polymethyl-siloxane fluid were used as antifriction additives. It has been shown that the introduction of antifriction additives at the stage of synthesis of oil-filled polycaproamide reduces the rate of anionic polymerization of ε-caprolactam. The influence of oils on the complex of physico-mechanical, thermal and operational properties has also been studied. It was found that the use of oils at the synthesis stage helps to reduce the coefficient of friction of the samples compared with the control sample. The best effect is observed when using 5 7 wt.% of petroleum oils (a decrease of 50 66% compared to the control sample). The water absorption of oil-filled polycaproamide samples containing petroleum oils is also reduced (by 37% compared to the control sample). At the same time, there is a deterioration in the physical and mechanical properties and an increase in oil and petrol absorption.

It is shown that the introduction of nitrogen-containing monomer units, N-(dibutylaminomethyl)methacrylamide, into the composition of polymers of higher alkyl acrylates increases their efficiency in the process of low-temperature solution dewaxing of oil raffinates of various compositions.

The esterification reaction of polyvinyl alcohol with para-aminophenylcyclopropane carboxylic acyl chloride has been studied in order to obtain a diversified polymer containing fragments of polyvinyl alcohol and groups, amino and cyclopropane rings, as well as other fragments in the side links of the macromolecule. As a result of the study, a new polymer was synthesized and its composition and structure were determined on the basis of IR and NMR spectroscopy data. The properties of the synthesized polymer have been studied and it has been established that the modified polymer has high antimicrobial properties, which makes it possible to use it as an antimicrobial substance in medicine.

The influence of quartz (silicon dioxide) content on main physical and mechanical properties of composites based on low density polyethylene is considered. It is shown that the introduction of a compatibilizer – a copolymer of high-density polyethylene with maleic anhydride – into the composition improves the properties and compatibility of the mixed components. The use of synthesized polyethylene wax as a plasticizer made it possible to significantly improve the deformability of highly filled composites. The method of thermomechanical studies shows the patterns of change in thermomechanical curves in the temperature range of 20 –200°C, depending on the concentration of quartz in the presence of a plasticizer and a compatibilizer.

The possibility of using the conformational approach to describe the crystallization kinetics during melt-crystal phase transitions in an inhomogeneous temperature field and to determine the molar mass range corresponding to a change in the crystallization mechanism is shown using the example of PMS brand organosilicon liquids. It is established that the curve of dependence of the mean square of the dipole moment of a macromolecule on the average molar mass of an organosilicon polymer contains three sections, each of which has its own crystallization mechanism.

Russian glass-filled materials based on polyphenylene sulfide were used for the first time as a structural material of parts of miniature power supply devices based on stand-by chemical current sources. The advantages of these materials over traditional press materials are shown, the main of which are increased structural strength, reduced defectiveness of parts, reduced number of rejects, improved technical and economic production indicators. The application of polyphenylene sulfide-based materials allowed developing of power sources possessing unprecedented short activation time and building the high-tech industrial production of power supply devices.

The paper presents the results of the development of conditions for the production of elastic polishing materials based on solutions of polyethyruretanes, for the chemical-mechanical planarization of semiconductor silicon wafers.

The results of experimental studies of the effect of polymer binder electropulse treatment directly in a mold on the strength characteristics of fiberglass are presented. The results of studies of the supramolecular structure and thermophysical properties of the polymer binder are presented. The physical interpretation of the results obtained in the work is presented.