The effect of treatment with a pulsed magnetic field on the triboacoustic characteristics of polymer friction composites containing up to 20 wt

For the first time, concrete results will be obtained and technologies for producing composite demulsifiers using local raw materials will be developed that can replace those imported from foreign republics, which are affordable, cheap and effective. The proposed demulsifier has the following main properties: high surface activity; flocculation ability; coalescing ability; wetting ability in relation to solid particles.

This paper discusses the results of research on the development of an import -substituting surfactant, conventionally called SAS-Kompozit-CCAS-DF, based on local raw materials and industrial waste for the introduction of composite chemicals and drilling fluids based on them used in the drilling of oil and gas wells. As a result, it was possible to use the developed material as an effective import-substituting surfactant with a low cost. The study of physico-chemical properties found that the developed SAS-Kompozit-CCAS-DF reduces surface tension and exceeds the widely used surfactant OP-10 and is similar to sulfanol. At the same time, the cost of SAS-Kompozit-CCAS-DF is 2 times cheaper than OP-10 and 3 times cheaper than sulfanol. Based on the conducted research, optimal compositions of composite compositions of chemical reagents of the CCR-DF class have been developed and the physicochemical and technological characteristics of a 10% drilling mud based on have been studied. Pilot production tests of drilling fluids obtained on the basis of composite chemical reagents of the CCR-DF class, which included the developed SAS-Kompozit-CCAS-DF, were carried out at oil and gas well No.50 "Surgil" in the system of Uzbekneftegaz JSC and gave positive results, as well as a recommendation for widespread use in the process of drilling oil and gas wells of the Republic of Uzbekistan

In this work, the chemical and material composition of man-made waste from molybdenum production and the method of its processing to extract valuable components have been studied. On the basis of theoretical and experimental studies, effective methods of extracting ammonium-molybdenum acid, ammonium perrhenate and copper concentrate were selected. The production of high-purity ammonium molybdenum is carried out by a standard method. The developed technology is environmentally friendly by reducing the use of ammonia at the initial stage. It is shown that the obtained product in terms of purity and chemical properties corresponds to State standard (GOST 2677-78) and is a finished product.

This article is devoted to the study of thermodynamic compatibility and structural characteristics of interpenetrating polymer systems (IPS) based on thermosetting and thermoplastic polymers for the production of vibration-damping and sound-absorbing composite polymer materials for machine-building purposes. IPS based on epoxy polymer and polyurethane is calculated according to the well-known Flory-Scott theory at a temperature of 373 K to obtain thermodynamic compatibility of the components of the mixture. Studies have established that between the macromolecules of homopolymers that make up the system, a donor-acceptor mechanism of covalent bonding occurs due to an unshared electron of the nitrogen atom and a cross-linked structure of interpenetrating polymer systems is formed, due to the thermodynamic compatibility of the components. The studies determined that at a temperature of 330 K, the coefficient of mechanical losses has a maximum corresponding to the relaxation process associated with the segmental mobility of the chain and the dynamic modulus of elasticity of the composition monotonically decreases with increasing temperature. The maximum vibration-absorbing properties based on epoxy and polyurethane polymers can be obtained at their ratio of 65:35.

The article discusses the results of a study on the development of effective compositions of anticorrosive composite polymer materials and coatings filled with organic-mineral ingredients based on epoxy resins ED-16 and ED-20. The compositions of the developed anticorrosive polymer compositions and the main physical-chemical and mechanical properties of the developed anticorrosive compositions based on oligomers and other organic-mineral ingredients are given.

The paper presents the results of experimental studies of the influence of treatment by an amplitude modulated high-frequency electromagnetic field on the dynamic mechanical and triboacoustic characteristics of friction composites with a polymer matrix intended for operation in unsteady friction units of brake devices of machines. It was found that in the dynamic mechanical characteristics, the effect of magnetic field treatment manifests itself most significantly in the change in the tangent of the angle of mechanical losses (a decrease in the maximum values of the tangent of mechanical losses to 52%), as well as in the change in the dynamic instability of friction and the spectral characteristics of frictional noise components in the range above 2 kHz.

The article discusses a study on the creation of new effective composite chemical flotation reagents blowing agents and the study of their physicochemical and flotation properties. The foaming ability and foam stability of the developed flotation reagents are shown to be used in the process of flotation of non-ferrous and noble metal ores based on local raw materials and production wastes. The results of laboratory-production tests of the developed flotation reagents-blowing agents of the KСF-VS type at the processing plant of the central laboratory of new technologies in the conditions of JSC "Almalyk MMC" are presented. АННОТАЦИЯ В статье рассматриваются исследования по созданию новых эффективных композиционных химических флотационных реагентов пенообразователей и изучение их физико-химических и флотационных свойств. Показано, что пенообразующая способность и устойчивость разработанных флотационных реагентов может быть использована в процессе флотации руд цветных и благородных металлов на основе местного сырья и отходов производства. Приведены результаты лабораторно-производственных испытаний разработанных флотореагентоввспенивателей типа КХФ-ВС на обогатительной фабрике центральной лаборатории новых технологий в условиях АО «Алмалыкский ГМК».

The article presents the results of studies of the tribotechnical properties of composite thermosetting polymeric materials based on an epoxy compound and ultrasonicated oligomeric fillers operating under conditions of contact interaction with a pulp using the example of raw cotton. Regularities of changes in tribotechnical properties (coefficient of friction, intensity of wear) of composite thermosetting epoxy polymeric materials associated with their filling with organomineral fillers and ultrasonic treatment, in contact with raw cotton have been revealed. The temperature and the magnitude of the electrostatic charge arising in the friction zone of rubbing polymer- cotton and composite-cotton pairs on the type and content of organic-mineral fillers were studied.

Experimental studies have been carried out to study the effect of various fillers on the physicomechanical and tribotechnical properties of the compositions, and the optimal filler contents have been established, which ensure the best properties of polyethylene, polypropylene, polystyrol and polyamide structural composite materials. The principle of design of shock-resistant, antifriction and antifriction-wear-resistant polyethylene, polypropylene, polystyrol and polyamide structural composite materials is proposed. Highly efficient structural composite materials for functional purposes have been developed on the basis of thermoplastic polymers and fillers of various structures and natures, which have sufficiently high strength and tribotechnical characteristics and have found application in the working bodies of cotton machines and mechanisms of the cotton processing industry operating under conditions of friction and wear.

Studying the dependence of the degree (α) and rate (ϑ) of the phase transformation of graphite into diamond on the synthesis time at different temperatures of the developed synthetic diamonds using the technology of high-pressure high-temperature synthesis in a metal melt (HPHT), we determined the critical mass of diamonds, which indicates the entry of the system into the stability region of graphite, where the graphitization of diamonds occurs. The role of implanted metals and hydrogen in the formation of synthetic diamonds and on its properties was also investigated.

The choice of objects of research for reducing vibration of parts and increasing the durability of machine designs and, consequently, the noise level in industrial premises is stated and justified. Methods for obtaining vibration-absorbing polymer compositions and samples for their testing under vibration conditions are described, as well as methods for studying viscoelastic properties, chemical structure, adhesive strength, microhardness, impact strength of polymer coatings and thermal conductivity of the obtained samples from compositions based on homopolymers filled with organomineral ingredients. The results of studies of the vibration-absorbing and adhesive-strength properties of polymer composite materials based on epoxy polymers and an organomineral filler - rubber powder are presented.