To simulate the processes of heat and mass transfer during bubbling and the design of equipment used in fat and oil production technologies, experimental data were obtained on the rates of ascent of nitrogen bubbles in sunflower oil, depending on their size in the temperature range 20–115 °C.

The paper presents the results of a study of temperature changes in biological tissues and polymethyl methacrylate under the influence of laser radiation. A comparative analysis of the thermophysical characteristics of materials was carried out, and the main parameters affecting the temperature distribution were determined.

We propose a method for calculating the anisotropy parameters of ellipsoidal orthotropic shells of geodesic reinforcement, which makes it possible to introduce the corresponding reinforcement parameters explicitly into the defining relations for any geometrical characteristics of a thin-walled shell when predicting its elastic macroscopic characteristics.

The photosensitive dispersion of AgHal (mostly in the form of AgBr) was obtained during the reaction of alkali metal halides and silver salts in the presence of a protective colloid – gelatin. The analysis of the formation and growth of nano- and microcrystals of silver halides in a photoemulsion on a gelatin matrix is carried out.

The paper studies the resistance to electromigration of structures with through holes not filled with tungsten and the effect of filling the holes with tungsten on the electromigration process. It is shown that with a decrease in the hole diameter in structures with holes not filled with tungsten, the mean failure time decreases due to poor aluminum coating and an increase in the ratio of the hole width to its length, and in the case of filling the holes with tungsten, the mean failure time does not depend on the diameter. It is shown that during electromigration, the resistance of the through hole changes due to the effect of high-density current, which causes silicon migration along aluminum with its subsequent deposition along the tungsten-aluminum interface.

Presents a laboratory method for obtaining trans-2-hexenal from available starting compounds, in which the main stage is the Wittig reaction between butanal and formylmethylenetriphenylphosphorane. This method has proven to be quite effective: during the synthesis, there are no problems with intermediate compounds and it has a stable yield of the finished product.

It has been considered the structural model allowing to obtain the dependence of relative volume content of interfacial regions in nanocomposites polymer/graphene on basic characteristics of their structure dispersity. The indicated characteristic is function of two factors – structure of nanofiller aggregates and volume fraction of nanofiller, that corresponds to requirements of nonequilibrium thermodynamics of solids. The application of methods of irreversible aggregation theory allows prediction of properties of the considered nanocomposites, which are true nanomaterials, reinforcing by interfacial regions on the whole.

In this article, the granules based on polycaprolactone (PCL) and bentonite in the ratio of 75/25 and 50/50 were obtained as a promising carrier for long-term release of isothiocyanates (ITC). According to GC-MS and FTIR spectroscopy, it was found that concentration of ITC in granules increases with increase in clay ratio and depends on the ITC species. It is observed that the inclusion of ITC in PCL/bentonite granules increases the persistence of ITCs in the soil for up to 45 days and prevents their premature hydrolysis.

The work is devoted to the study of turbidity values and the degree of purification in natural waters of mountain rivers using a water-soluble polyelectrolyte based on polyallyldimethylammonium chloride. The use of polyelectrolyte allows for a 1,5-fold reduction in dosage without compromising the effectiveness of sedimentation compared to other concentrations. The water-soluble polyelectrolyte forms stable complexes with heavy metal ions and is an effective agent for removing contaminants from natural and wastewater.

A polymer compound recipe with special additives has been developed for the production of fire-resistant aluminum panels; optimal technological modes for the production of granulated compound by extrusion have been proposed; and the main quality indicators of the polymer compound have been determined.

Plastic masses have firmly entered the life of a modern person. Many physical and mechanical characteristics of polymer materials and products based on them are determined by a physical quantity called density. It depends on the chemical structure of the initial polymer, the presence of crystalline regions in it, as well as the content of various functional additives. High-density polyethylene is one of the widely used polymers in various fields of industry and agriculture. Therefore, the development and investigation of the nature of the effect of new stabilizers and modifiers for polymer materials is an urgent problem.

Using high-temperature and low- temperature polycondensation methods, block copolyesters based on oligoesters and bischloroformate were synthezized and their properties were studied. The dependence of properties on the composition and structure of oligoesters is shown. An increase in the content of oligoetherformal leads to an increase in the stability of block copolyesters in alkaline environments.