Phosphazene-containing benzoxazine compounds based on diamines of various structures were obtained as a result of the work performed. The resulting compounds were characterized by 1H NMR spectroscopy, the thermal and rheological properties of benzoxazines based on diamines were studied, and data of flammability were presented. The effect of the structure of the initial diamine on the properties of the resulting monomer and polymer has been studied. The curing kinetics of compositions of benzoxazines with different contents of phosphorus-containing flame retardant catalysts based on hexachlorocyclotriphosphazene and m-toluidine was studied. The synthesized monomers and the resulting compositions of benzoxazines with flame retardant catalysts can be used as heat and fire resistant binders for polymer composite materials, as well as hardeners for epoxy resins.

ITo obtain structural adhesives, a new method for modifying an epoxyamine matrix with an LPP brand adduct synthesized from oligoetherepoxide (Laproxide) in the presence of an excess of piperazine is considered. Curing kinetics of compositions has been studied by rheometry and DSC. Based on DSC data, equations that simulate curing at different stages of the process were proposed. The gelation times of the compositions have been established.

The paper presents the results of the study of rheological properties of melts of dispersion-filled polymer materials based on polyethylene containing glass microbeads manifested under tensile stress in a thermostating bath. The dependences of tensile multiplicity on loading time are plotted, models describing the processes of stretching and subsequent relaxation are presented, the value of relative viscosity of composite materials is obtained.

The colloid-chemical properties of organosilicon surfactants with different solubility in water were studied. The behavior of organosilicon surfactants of various structures in model systems - Langmuir films at the water-air interface has been studied. The results obtained showed that high stability of polymer suspensions is observed only in the presence of insoluble in water organosilicon surfactants.

The paper shows the similarity of kinetic regularities of vinyl monomers polymerization in the presence of Laprol 6003, regardless of the degree of solubility of the monomers in water. It is assumed that this feature of polymerization is due to the same mechanism of formation of polymer-monomer particles (PMP) – from monomer microdroplets. The interfacial adsorption layer of PMPs, the main site of polymerization, is formed from a surfactant adsorbed from the bulk of the monomer phase and a polymer formed in the adsorption layer upon initiation of polymerization. The formation of complex structures in the interfacial adsorption layer of particles, the incompatibility of the surfactant and the resulting polymer, and high viscosity cause the formation of a strong interfacial layer that ensures the stability of polymer suspensions from the early stages of polymerization.

New polyazomethines were synthesized by low-temperature polycondensation of urea and aromatic dialdehydes. The optimal conditions for the process of obtaining polyazomethines have been determined. The structure of the obtained polyazomethines was determined by IR spectroscopy and elemental analysis methods. The synthesized polyazomethines are partially crystalline, highly soluble and fusible materials. It was established that the synthesized polyazomethines have an increased thermal stability, which depends on the structure of the initial aromatic dialdehyde. It was found that polyazomethine based on carbamide and 4,4’-diform yldiphenoxyterephthalate melts, exhibiting liquid crystalline properties. It was shown that the obtained polyazomethines are fiber and film-forming materials.

The influence of the concentration of nanoparticles of non-ferrous metals (aluminum and copper) on such physicomechanical properties of polypropylene as ultimate tensile stress, tensile yield strength, bending strength, elongation at break, heat resistance, melt flow rate is considered. The optimal concentrations of copper and aluminum nanoparticles have been determined, at which relatively high values of strength indicators are achieved. The influence of sulfuric vulcanization on the regularity of changes in strength properties has been studied.

The main methods for determining the maximum content of the dispersed phase and designing the compositions of polymer composite materials (PCM) with different types of dispersed structure are considered on the example of rice straw powder (RSP) particles deforming under pressure.
It is shown that different methods for determining the maximum content of RSP in PCM make it possible to obtain data on the packing and internal porosity of RSP particles.
It has been established that dispersed RSP particles deform under pressure, and at a pressure of ~500 MPa their density almost reaches the value of the true density of the substance (~1.55 g/cm3).
The maximum content of RSP with deformable particles in dispersed PCM can reach ~95 vol.%, which significantly expands the possibilities of polymer materials science and makes it possible to practically solve the environmental problem of using agricultural waste in the form of rice straw.

The paper presents the problem of averaging the squared vector quantities of complex polymers, based on the determination of the average values of the dipole moment squared for the μ-th monomer unit of the chain and the subsequent averaging over possible conformations within the whole macromolecule within the framework of the conformational approach.

Samples of eight grades of polyethylene from various manufacturers: PE100 2NT11-9 (Kazanorgsintez plant), Hostalen CRP-100 with increased resistance to cracking, PE 100RC, Hostalen 4731 PG - powder (LyondellBasell); PERT type I and II Dowlex 2344 and Dowlex 2377 (Dow), PE100 P6006 AD (Sabic); PE100 H1000PC (SCG, Thailand) tested for wear according to the ISO 9352 method with the determination of hardness and the wear mark. A rank of materials with consistently decreasing wear resistance has been determined, this series persists when worn on abrasives 32N, 12N and 4N according to GOST 5009-82. It is shown that the wear occurs uniformly along the thickness.

The possibility of using brominated phthalates obtained from wastes of butyl alcohol production by oxosynthesis as a plasticizerflame retardant in composites based on cellulose ethers is considered. A regression equation has been obtained for the quantitative description of the cellulose compositions flammability depending on the type of cellulose ether, the type of plasticizer-flame retardant and its content in the composite. It has been shown that the flammability of plasticized compositions based on various cellulose ethers depends only on the content of the flame retardant element in the composition. An indicator to assess the degree of inhibition of the flame propagation in compositions based on cellulose ethers from the content of brominated phthalate plasticizer from waste production is proposed, which can be used to evaluate the effectiveness of various flame retardants in such compositions.