Abstracts

№6, 2014

Chemical Division of Industry in To-Day Condition of Economics Stagnation and Use of Sanction – Gavrilenko V.A. (P. 4)

The main parameters, reflected state of chemical division of industry in 2014, including changes in markets of chemical and oil chemical production

Key words: chemical division of industry, markets of chemical and petrochemical production, economics stagnation, sanction

Microstructure of High Cis-Butadiene Rubber by 13C NMR Data: Quantitative Relationships – Makhiyanov N. (P. 8)

Started from analyzes of 13C NMR spectra of high cis-butadiene rubber, published in previous issue of the journal, the new relationships for integral intensity of signals are presented. As a result the correctness and information content of quantitative characteristics of cis-butadiene rubbers became better.

Key words: high cis-butadiene rubbers, 13C NMR spectra, quantitative characteristics

Stabilization of Butyl Rubber by the 2,6-bis(3,3',5,5'-di-tert-butyl-4,4'-hydroxybenzyl)cyclohexan-1-one – Saigitbatalova S.Sh., Cherezova E.N., Liakumovich A.G. (P. 12)

Effectiveness of the 2,6-di(3,3',5,5'-di-tert-buthyl-4,4'-oxybenzyl)-cyclohexan-1-one as antioxidant in butyl rubber is studied. Thermo oxidative aging is shown to be at the level of that of rubber with the antioxidant Irganox 1010.

Key words: butyl rubber, antioxidant, stabilizer, thermo oxidative aging

Modification of Acrylonitrile Butadiene Rubber by Small Quantities of Silicones – Omelchenko A.N., Khoroshavina Yu.V., Nikolaev G.A., Ramsh A.S., Kurlyand S.K. (P. 16)

Properties of blends of BNR (for example BNKS-18AMN) and small quantities of silicone rubbers have been studied. According to the data of dielectric relaxation the use of these additives results in the change of the nature of the nearby packing of the rubber. The strongest effects on temperature of tangent of dielectric losses tgδmax as well as the changes of dielectric permeability ∆ε' at the α-transition are observed at the introduction of low-molecular polymethyl(hexafluoroalkyl)silicones SKTNFT-K-50 and SKTNFT-K-100. Substantial increase of the strength of vulcanizates based on these systems is shown.

Key words: BNR, low-molecular silicones, dielectric relaxation, strength

Effect of Coagent of Peroxide Modification on Viscous Properties of Binary Blends of Polypropylene and Ethylene-Propylene Rubber – Ryzhikova I.G., Bauman N.A., Volkov A.M., Kazakov Y.M. Volfson S.I., Nikiforov A.A. Yarullin R.S. (P. 18)

Effect of coagent of peroxide modification of different chemical structure on viscous properties of binary blends of polypropylene (80%) and ethylene-propylene or ethylene-propylene diene rubbers (20%), has been studied. Possibility of variation of viscous properties by the chose of coagent or by the change of quantity of peroxide is shown.

Key words: polypropylene, ethylene-propylene diene rubbers, modification, peroxides, coagents, viscous properties

Polyurethanes of Different Molecular-Mass Characteristics as

Objects for the Ozone Damaging Effects Estimation – Puchkov A.F., Novakov I.A., Nistratov A.V., Tuzhikov O.O., Kablov V.F.,

Orlyanskaya P.N., Lapin S.V., Pilnov D.V. (P. 22)

Effect of ozone on polyurethanes of different structure has been studied by means of optical microscopy and IR-spectroscopy as well as the measurement of mechanical properties. It is shown that polyurethanes can be acceptable objects for the study and evaluation of ozone effect on elastomer samples in the planar stressed state.

Key words: polyurethanes, ozone, optical microscopy, IR-spectroscopy, mechanical properties

Characteristics of Rheokinetic of Silylated Polyurethane Elastomers – Shabalina M.S., Antipova E.A., Khlebov G.A. (P. 26)

The rheokinetics of curing of silane-modified polyurethane elastomer materials in relation to various factors is studied. The possibility of the use the relationships obtained to solve some technological problems is shown. These problems are: formulation development, pot life determination, development of technological strength materials.

Key words: rheokinetics of curing, SPU-oligomer, silane-modified polyurethane, gel time

To Thermal Protection of Polymeric Components in the Course of Assembling from the Action of High Temperatures – Mashkov A.V., Dakhno A.V., Potapenko O.V., Smirnov Yu.P. (P. 30)

Four ways of calculation of temperature of the metal of a nipple in the area of a rubber assembling are presented. Their analysis opens the possibility to reduce the temperature of the metal. The most effective method, which allows the nipple welding without delaminating and thermal destruction of rubber, has been determined.

Key words: polymeric covering, nipple, temperature, heat emission coefficient.

Nanocomposites Based on 1,2-Polybutadiene Modified by Nano-Sized Titania – Yulovskaya V.D., Kosova O.V., Kuzmicheva G.M., Monakhova T.V., Karpova S.G., Domoroschina E.N. (P. 36)

Effect of nano-sized titania (NST) prepared by sulfate technique (anatase and η-TiO2) and commercial Degussa P25 on properties of their composites with 1,2-polybutadiene (1,2PB) is studied by a complex of methods. Mixtures were prepared with LB 300 160/160 laboratory rolls by stirring for 10 min. Elastomer was first modified with a curative group (sulfur, zinc oxide, stearic acid, dibenzothiazolylsulfide and tetramethyltiuramdisulfide) and then with NST. The NST structure is shown to affect the degree of interaction between 1,2-PB and titania. Titania introduction extends the temperature range of the material working capacity.

Key words: 1,2-polybutadiene, nano-sized titania, modification, properties, nanoadditives, nanocomposites

Rubbers Based on Blends of Propylene Oxide and Ultrafine Polytetrafluoroethylene – Portnyagina V.V., Petrova N.N. (P. 40)

Results of the development of sealing rubbers based on blends of propylene oxide (PO) and ultrafine polytetrafluoroethylene (UPTFE) for North appliances are presented. Positive effect on the material properties is achieved at addition of 0.5 – 1,0 parts by weight of UPTFE per 100 parts by weight of PO. This is due to the high activity of particles UPTFE, their nanostructure organization and uniformity of their distribution in the elastomer matrix. RF patent is received on the formulation of rubber.

Key words: sealing materials, propylene oxide rubber, ultrafine polytetrafluoroethylene, nanostructured organization, low temperature resistance, wear resistance.

Discrete Mathematical Model of Thermal Oxidative Degradation of Polymers in Solution – Bityukov V.K., Tikhomirov S.G., Khaustov I.A., Khvostov A.A., Karmanova O.V., Popov A.P. (P. 44)

Discrete mathematical model of the kinetics of the change of fractional composition of dissolved polymer under the action of thermo-oxidative degradation in isothermal conditions is presented. The rate constants of chemical reactions are estimated for the case of degradation of reaction mixture under the bubbling of atmospheric air.

Key words: mathematical modeling, dissolved polymer, thermo-oxidative degradation, molecular-weight distribution, bubbling 

Strain Energy of Incompressible Body of Isotropy under Finite Deformation – Gamlitskiy Yu.A. (P. 48)

The problem of phenomenological description of dependence of strain energy on the strain invariants for incompressible material (rubber), maintaining isotropy under finite deformation, is solved. The existence of only single solution of this problem is demonstrated. The coincidence with the Khazanovich’s strain energy (Khazanovich’s potential) derived from molecular considerations is shown. Comparison with experiment is presented.

Key words: rubber, stress, strain energy, isotropy

Word Production of Chloroprene rubbers – Il’in V.M., Rezova A.K. (P. 52)

Review devoted to properties and world production of chloroprene rubbers.

Key words: chloroprene rubbers, chloroprene rubbers world production

Patent Instructions to Exporter – Busarev G.G. (P. 58)

Main instructions to exporter, some features of International patent legislation and review of patents devoted to rubber shock absorbers are presented.

Key words: patents, International patent legislation, shock absorbers

Chemistry+-2014 (P. 60)

Information on the events at Exhibition Chemistry+-2014 (21 – 24.10.14., Moscow, Expocenter): International Chemical Assembly “Green Chemistry, Exhibitions Chem-Lab-Analiyt-2014, Chemmash. Pumps-2014; Exhibition “Plastic Industry; “II International Chemical Forum”Strategy of the development – Investments in the Future.

Key words: chemical production, green chemistry, laboratory equipment, pumps, production of plastic industry, investments, development