CONTENTS of journal "Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov" ("INDUSTRIAL PRODUCTION AND USE OF ELASTOMERS") 1•2021 (Russia)
ANNIVERSARY
90th Anniversary of the Synthetic Rubber Industry (pp. 3-9)
POLYMER
УДК 678.762.2-134.622
https://doi.org/10.24412/2071-8268-2021-1-10-15
STEREOREGULATION OF THE STRUCTURE IN THE PROCESS OF THE (CO)POLYMERIZATION OF DIENES AND BUTADIENE WITH STYRENE IN THE PRESENCE OF METAL ALKOXIDES INITIATORS (pp. 10-15)
Glukhovskoy V.S.1, Kharitonov A.G.1, Berdnikov V.V.1, Komarov E.V.1, Firsova A.V.1, Zemskiy D.N.2, Polykhin E.L.3, Rumyantceva A.L.3
1Voronezh branch of FSUE «NIISK», 394014, Voronezh, Russia
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2Institute of Chemical Technology «KNRTU», 423578, Kazan, Russia
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3Centre «Elastomer» AO «Voronezhsintezkauchuk», 394014, Voronezh, Russia
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ABSTRACT
The effect of alcohol derivatives, first obtained on the basis of THFS and butyl cellosolve, and mixed alcoholates of alkali and alkaline earth metals in the composition of the complex initiating polymerization with n-butyllithium, on the microstructure of polydienes was studied. The molecular weight characteristics of the obtained copolymers, the physical and mechanical properties of vulcanizates, and the elastichysteresis characteristics of rubbers based on functionalized rubbers have been determined. It has been established that the initiating system allows one to obtain copolymers with a controlled content of 1,2- and 1,4-trans-units of the butadiene part of the macromolecule, and rubbers based on functionalized rubbers have high consumer properties. It is shown that the search for effective highmolecular softeners and activation of the surface properties of nanofillers by oligomeric compounds are among the main problems solved in the modification process. In addition, an urgent task is to increase the heat resistance of elastomers and compositions based on them due to the introduction of various additives, the most effective of which are epoxy oligomers.
KEYWORDS: mixed alkoxides of alkali and alkaline earth metals; butyllithium; butadiene; styrenebutadiene copolymers.
For citation: Glukhovskoy V.S., Kharitonov A.G., Berdnikov V.V., Komarov E.V., Firsova A.V. Zem skiy D.N., Polykhin E.L., Rumyantceva A.L. Stereoregulation of the structure in the process of the (co)polymerization of dienes and butadiene with styrene in the presence of metal alkoxides initiators. Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov, 2021, no. 1, pp. 10-15.
TECHNOLOGY AND PROCESSING OF POLYMERS AND COMPOSITES
УДК 678
https://doi.org/10.24412/2071-8268-2021-1-16-22
INFLUENCE OF HEAT ABSORPTION MODIFIERS ON THE CHARACTERISTICS OF COMPOSITE MATERIALS BASED ON ELASTOMERS (pp. 16-22)
Vu Manh Hung1, Gaidadin A.N.1, Petryuk I.P.2, Pham Kim Dao3, Abzaldinov KH.S.4
1Volgograd State Technical University, 400005, Volgograd, Russia
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2Kostroma State Agricultural Academy, 156000, Kostroma, Russia
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3Institute of Propellants and Explosives, 100000, Hanoi, Vietnam
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4Kazan National Research Technological University, 420015, Kazan, Russia
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ABSTRACT
The authors investigated the possibility of using an elastomeric composition based on ethylene-propylene rubber modified with various crystalline hydrates (citric acid, calcium chloride, and lithium fluoride). The authors have established the possibility of using crystalline hydrates as functional fillers to increase the efficiency of heat absorption by composites based on elastomers, including thermosetting rubbers. The influence of the nature of crystalline hydrate on the acceleration of the vulcanization process and reduction of its time is shown. Also, the possibility of varying mechanical parameters was established due to the use of modifiers of various nature.
KEYWORDS: elastomer, rubber, fire-resistant material, crystallohydrate of salt, kinetic parameters of vulcanization.
For citation: Vu Manh Hung, Gaidadin A.N., Petryuk I.P., Pham Kim Dao, Abzaldinov Kh.S. Influence of heat absorption modifiers on the characteristics of composite materials based on elastomers. Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov, 2021, no. 1, pp. 16-22.
УДК 665.7
https://doi.org/10.24412/2071-8268-2021-1-23-28
IMPROVING SEALANT PROPERTIES USING DESTRUCTED STYRENE BUTADIENE RUBBER (pp. 23-28)
Nikulin S.S.1, Enyutina M.V.2, Filimonova O.N.2, Nikulina N.S.3,
1Voronezh State University of Engineering Technologies, 394036, Voronezh, Russia
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2MESC AF «AFA named after Professor N.E. Zhukovsky and Y.A. Gagarin», 394064, Voronezh, Russia
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3Voronezh Institute for Advanced Studies of the State Fire Service of the Ministry of Emergency Situations of the Russian Federation, 394052, Voronezh, Russia
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ABSTRACT
Methods of obtaining various types of sealants for reconstruction of seams of airfield pavements, their performance properties and organic components that increase the elasticity and frost resistance are considered. The possibility of obtaining a cold curing sealant based on low molecular weight diene rubber (destructed waste styrene-butadiene copolymer) with the introduction of high-styrene styrene-butadiene copolymer latex and antioxidants of various types has been substantiated. Technological stages for obtaining experimental samples have been developed, which include the processes of destruction of styrene-butadiene rubber SKS-30 ARK in a solvent in the presence of atmospheric oxygen and a catalyst, homogenization of the polymer mixture, steam stripping, introduction of antioxidants and a curing agent. Samples of sealants with antioxidants 2-vinylphenothiazine, Agidol-2, VS-30A, VTS-150 were studied. The ratios of the components of the sealant composition were selected using the planning of the experiment according to the plan of the Latin square of the fourth order.
KEYWORDS: sealant, antioxidants, degraded rubber waste, properties, airfield coating.
For citation: Nikulin S.S., Enyutina M.V., Filimonova O.N., Nikulina N.S. Improving sealant properties using destructed styrene butadiene rubber. Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov, 2021, no. 1, pp. 23-28.
УДК 678.7
https://doi.org/10.24412/2071-8268-2021-1-29-33
INFLUENCE OF GRAPHENE ON THE PROPERTIES OF THERMO-AGGRESSIVELY RESISTANCE RUBBER (pp. 29-33)
Spiridonov I.S.1, Ushmarin N.F.1, Egorov E.N.2, Sandalov S.I.1, Kol’tsov N.I.2
1Cheboksary Production Association named V.I. Chapaev, 428006, Cheboksary, Russia
2Chuvash State University, 428015, Cheboksary, Russia
ABSTRACT
The article investigates the effect of graphene nanocomposite with carbon black P 803 on the plastoelastic and rheometric properties of the rubber mixture, the physical-mechanical and performance characteristics of rubber based on NBR 2645 nitrile-butadiene rubber. The effect of graphene was studied by means of an equal mass substitution 60.00 wt. of сarbon black P 803 on prototypes «graphene – carbon black P 803». It was found that graphene additives accelerate the process of vulcanization of the rubber mixture and increase its viscosity. The minimum and maximum torques for variants of rubber mixture containing graphene are increased, and the onset and optimum times for vulcanization of the rubber mixture are slightly reduced. A vulcanizate containing 10% CNTS (10% graphene etched with hydrochloric acid, with deposited 10% SiO2, in mixture with carbon black P 803) has the highest modulus at 100% elongation, tensile strength and tear resistance. Compositions of graphene with carbon black P 803 practically do not affect the elongation at break and the change in the hardness of vulcanizates after a daily exposure to air and in oil liquid SZhR-1 at a temperature of 100°C, as well as their mass in the mixture «isooctane + toluene». The vulcanizate containing 10% CNTS is most resistant to aggressive media. Graphene together with carbon black P 803 does not change the temperature regime of vulcanization and the temperature of destruction of the rubber mixture based on NBR 2645 rubber.
KEYWORDS: graphene, carbon black P 803, nitrile butadiene rubber, rheometry, physical and mechanical and operational properties.
For citation: Spiridonov I.S., Ushmarin N.F., Egorov E.N., Sandalov S.I., Kol’tsov N.I. Influence of graphene on the properties of thermo-aggressively resistance rubber. Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov, 2021, no. 1, pp. 29-33.
REVIEW
УДК 678.632
https://doi.org/10.24412/2071-8268-2021-1-34-43
COMPOSITE MATERIALS BASED ON PHENOLFORMALDEHYDE RESINS (pp. 34-43)
Aliyeva A.P.,
YU.G. Mamedaliev Institute of Petrochemical Processes NAS, Azerbaijan
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ABSTRACT
An informal overview of recent research in the field of synthesis and the practical use of phenolic resins is presented. The labors on application of phenol-formaldehyde resins in the woodworking industry as binders, plasticizers, adhesives, impregnating materials are described. The possibility of partial replacement of phenol with low-toxic reagents of natural structure is considered. The article reports on obtaining composite materials with improved thermal and physical-mechanical properties by introducing boron and silicon containing compounds. Attention was also given to the results of studies of phenolic resins containing carded groups. Methods of modifying phenol-formaldehyde resins with various organic compounds, in particular nitrogen-containing ones, are presented. The labors describing the effectiveness of phenolic resins as anticorrosive, protective composite compositions are presented.
KEYWORDS: phenol formaldehyde resin, composition, woodworking, thermal properties, physical and mechanical properties, modification.
For citation: Aliyeva A.P. Composite materials based on phenol formaldehyde resins. Promyshlennoye proizvodstvo i ispol'zovaniye elastomerov, 2021, no. 1, pp. 34-43.
MEETINGS (pp. 44-48)
