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1.
D. V. Lopatik O. M. Bondareva I. F. Osipenko T. N. Sidorenko A. P. Gorbatenko N. G. Galakova N. R. Prokopchuk 《Fibre Chemistry》1993,24(2):137-139
Conclusions It has been shown that the use of the industrial S-1 thermostabilizer in the synthesis of polyethylene terephthalate aids in obtaining high molecular polymer with an improved thermal stability and an increased degree of crystallinity.The effect of S-1 thermostabilizer on the physicomechanical properties complex polyester yarns has been studied. It has been found that with time, the complex yarns obtained undergo structural changes which lead to a decrease in the initial strength characteristics.Institute of Physicoorganic Chemistry, Academy of Sciences of Byelorussia. Mogilevskii Khimvolokno PO. Translated from Khimicheskie Volokna, No. 2, pp. 41–42, March–April, 1992. 相似文献
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3.
Valeri Smolenski Alena Novoselova Alexander Osipenko 《Journal of Nuclear Materials》2009,385(1):184-71
This work presents the electrochemical study of YbCl3 in molten CsCl in the temperature range 973-1073 K. Transient electrochemical techniques have been used in order to investigate the reduction mechanism, transport parameters and thermodynamics properties of the reaction YbCl2+1/2Cl2=YbCl3. The results obtained show that the reduction reaction is reversible being controlled by the rate of the mass transfer. The diffusion coefficient of [YbCl6]3- complex ions was determined. The apparent standard electrode potential of the soluble-soluble redox system Yb3+/Yb2+ was obtained by cyclic voltammetry. 相似文献
4.
I. Sh. Trakhtenberg A. B. Borisov V. I. Novozhonov A. P. Rubshtein A. B. Vladimirov A. V. Osipenko V. A. Mukhachev E. B. Makarova 《The Physics of Metals and Metallography》2008,105(1):92-97
Mechanical properties and characteristics of the porous material obtained by sintering of compacted granules of titanium sponge of grade TG-OP-01 have been investigated with the purpose to develop a technology of production of biocompatible orthoimplants. The content of pores θ was from 20 to 60%. As θ increased from 20 to 50%, the Brinell hardness H B, maximum bending strength σbend, and impact toughness K c decreased, following the empirical dependences H Bθ = const, σbend × θ2 = const, and K c × θ1.5 = const, respectively. At θ > 50%, there was observed a stronger drop in these values. The experiments on the absorption of water by the pores and an analysis of the filtration properties of the material made it possible to establish that the basis of the system of pores connected with the surface is composed by the gaps between the pressed granules 0.1–0.2 cm sintered during annealing rather than by the small (~ 100 μm) pores in the granules. 相似文献
5.
Osipenko M. A. Kharitonov D. S. Makarova I. V. Romanovsky V. I. Kurilo I. I. 《Protection of Metals and Physical Chemistry of Surfaces》2021,57(3):550-558
Protection of Metals and Physical Chemistry of Surfaces - The dependences of the protective properties of the anodic oxide coatings on the AD31 aluminum alloy surface modified with nitrates of... 相似文献
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7.
We consider a close wake behind a pair of cylinders at a Reynolds number of Re ~ 1000 defined by the cylinder diameter in the case of small aspect ratio of cylinders, H/D ≈ 3.5. The large-scale structure of such a wake represents a f low like two interacting Karman streets and it is modeled by two coupled Van der Pol oscillators. The mutual inf luence of closely located Karman streets is accounted for by nonlinear (of a general parabolic type) terms in the equations for oscillators. Moreover, the equations are generalized with allowance for explicit dependence of the oscillation frequency on its amplitude. Within the framework of this three-parametric model, five collective modes of the wake behind cylinders were found. In addition, there are the domains of model parameters where qualitatively different modes of intermittent wake exist. 相似文献
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9.
We develop a model of fracture of pipeline steel in the process of hydrogenation and present a classification of the origins
of hydrogen-induced fracture. Possible modes of the formation of systems of stepped cracks with different origins are determined
and investigated and the process of multiple fracture is analyzed.
Institute of Problems in Mechanics, Russian Academy of Sciences, Moscow. Translated from Fizyko-Khimichna Mekhanika Materialiv.
Vol. 32, No. 3, pp. 25–33, May–June, 1996. 相似文献
10.
O. M. Bondareva V. I. Grachek D. V. Lopatik G. R. Motol'ko S. F. Naumova I. F. Osipenko N. R. Prokopchuk 《Fibre Chemistry》1987,18(6):438-441
Conclusions The possibility of using aromatic esters of boric acid as thermostabilizers for polyethylene terephthalate has been investigated.It has been found that the use of borates containing a naphthyl or p-hydroxyphenyl group as thermostabilizers makes it possible to obtain a polyethylene terephthalate with improved mechanical properties and an increased thermal stability.Translated from Khimicheskie Volokna, No. 6, pp. 24–26, November–December, 1986. 相似文献