The possible reasons for the occurrence of emulsion polymerization of a monomer simultaneously with suspension polymerization, namely the formation of polymer particles from a highly dispersed fraction of monomer droplets in the initial emulsion and associates of high molecular weight surfactants, are considered. Data on colloidal solubility of monomer in surfactant associates and data on determination of hydrodynamic radii of high molecular weight surfactant associates are presented. The results obtained can be the basis for the choice of surfactants in suspension polymerization, which ensure the minimum contribution of the highly dispersed fraction of monomer droplets to the formation of polymer-monomer particles.

Thermal stability and ageing of glass-filled polyphenylenesulfide were investigated.

The effect of nanofillers additives containing zinc oxide nanoparticles stabilized by a polymer matrix of maleinized low density polyethylene obtained by the mechanochemical method on the structure and properties of metal-containing nanocomposites based on isotactic polypropylene and low density polyethylene using differential thermal (DTA) and X-ray phase (XPA) analyzes.

Studies evaluating the patterns of changes in microhardness over the thickness of samples were carried out on samples of a hybrid composite material 4.8 mm thick, in which glass and carbon fibers were used as a filler, and UP-2227N binder was used as a matrix. Microhardness measurements were carried out only in the zones of the matrix in transverse sections with a load on the indenter of the microhardness meter equal to 10 grams (0.1 N). It was found that the microhardness of the samples of fiberglass changes according to a parabolic law from the front surface of the sample to the reverse one, with the maximum values of microhardness in the middle of the altitude section, and the minimum in the subsurface zones.

It was found that the modification of the cation-exchange phenol-formaldehyde matrix with a phenolic resin and addition of thermo- and microwave-treated basalt fiber filler at the stage of its synthesis provide a synergistic effect on the basic functional characteristics of the synthesized composite cationite.

A technology for producing composite materials based on polyimides is proposed. The obtained composite materials were tested for tensile strength. The dependence of the tensile strength on the concentration of the polyimidic acid solution is determined. The degree of impregnation of manufactured samples was investigated. The dependence of the tensile strength on the degree of impregnation is determined.

Modification of polyacrylamide with hydroxyl and carboxyl-containing compounds was studied. The effect of modifiers on the glass transition temperature was studied using thermomechanical analysis and differential scanning calorimetry. Infrared spectroscopy of modified compositions was also performed to study the effect of modifiers on the chemical structure of polyacrylamide. It is established that the selected modifiers can be used as plasticizers for polyacrylamide.

New benzylidenphenylenediamines containing azomethine groups were synthesized by condensation of m-, o-nitrobenzaldehyde and m-phenylenediamine. The structure of the obtained benzylidene-phenylenediamines was confirmed by spectral methods and elemental analysis. It was found that benzylidenephenylenediamines irradiated with UV light exhibit luminescent properties. The synthesized benzylidenephenylenediamines are capable of oxidative polymerization to form polymers with conjugated systems. The effects of various factors on the polymerization of benzylidenephenylenediamines were studied. It was established that the obtained polybenzylidenephenylenediamines have noticeable heat resistance and electrical conductivity.

It is shown that the simple rule of mixtures describes correctly the elastic modulus of polymer/carbon nanotubes nanocomposites, if the real characteristics of the nanofill are used instead of the nominal ones. These characteristics are determined by the structure of carbon nanotubes in the polymer matrix. The factor of effective length (aspect ratio) of carbon nanotubes pays the main contribution to nanocomposites stiffness.

The paper proposes equations that allow calculation the tensile strength of foam plastics of various nature depending on the degree of foaming. It is shown that elastic foams have lower strength characteristics compared to rigid ones. This is due to their structural features in tension.

The previously proposed indicator of the estimated wear resistance resource [1] was used for voluntary certification of polyethylene pipes for pulp transportation. The enterprise standard [2] has been developed for determining the estimated wear resistance resource. Wear resistance resource determinations for pipes of various diameters and SDR have been performed. It is shown that the estimated resource of wear resistance can be increased by 3-4 times by selecting the optimal pipe design and changing the pipe material.

We have investigated thermal degradation of cellulose, polypropylene, low-density polyethylene, high-density polyethylene, polycarbonate, polyimide, polyvynilalkohol, polyvynilchloride, polystyrene, and polyphenilenoxide using DSC method and thermogravimetric and also thermal processes in mixtures polymer - 50% aluminum after plastic deformation at pressure 1 GPa. Thermal degradation of polymers accompany by exothermal effects; the enthalpy varies from 3 to 19,5 kJ·g^-1. Enthalpy of aluminum oxidation varies from 3 to 16,7 kJ·g^-1.

The paper considers the main factors of environmental safety of the "phosgene-free" polycarbonate production technology in comparison with the processes based on the use of phosgene. Historical stages of development of this technology and the main technological solutions ensuring its effectiveness are reviewed. The advantages of the “phosgene-free” technology are demonstrated using the example of Kazanorgsintez PJSC, which created the only polycarbonate industrial unit in the Russian Federation. The main characteristics of the polycarbonates produced are presented.

The results of the study of the influence of temperature and pressure of injection molding on the properties and volume shrinkage of nanocomposites based on linear low-density polyethylene and natural mineral fillers are presented. A copolymer of ethylene with butylene, a copolymer of ethylene with hexene, and such natural Azerbaijan minerals as vesuvianite and clinoptilolite were used as raw materials.

In the article, the basic requirements for the technological and operational properties of polymer composite materials based on epoxy oligomer and hollow glass microspheres are formulated. The developed materials based on the VSE-34 binder have adjustable viscosity and are well compatible in chemical nature and processing modes with the covering for honeycomb structures. The materials considered are intended for filling sections of honeycomb core consdtructions in the manufacture of wing panels, high-lift devices, etc. It is shown that the materials developed by the VIAM State Research Center meet the set requirements and correspond in terms of properties to the best foreign analogues.

The paper presents the results of studies of the important physicochemical and technological parameters of the CCR-2 composite highly filled polymer chemical reagent, consisting of Na-CMC, alumac, soda ash and caustic soda and waste from the production of chemical fertilizers, as well as drilling fluids based on it. The compositions and physicochemical properties of the waste-slag of the chemical plant of Farg'onaazot JSC, which increases the density and water index of drilling fluids, were studied in detail.

The optimal compositions of composite polymer chemical reagents of CCR-2 class using waste-slag from chemical production of fertilizers have been developed.

The physicochemical and technological characteristics of the developed composite highly filled polymer chemical reagents KHR-2 (from KHR-2-1 to KHR-2-5) and 10% low and medium density drilling fluids based on them are given.

Currently, cabinet furniture is made mainly of composite materials, such as chipboard, oriented strand board, fiberboard and medium-density fiberboard. Despite increasing demand for this type of product, the plates produced by the domestic industry (especially chipboard) have a drawback - a toxicity due to the release of formaldehyde harmful to humans. Thus, the solution to the issue of reducing the toxicity of chipboard is currently turning into a problem. This problem is comprehensively covered in the article.