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排序方式: 共有300条查询结果,搜索用时 15 毫秒
21.
V. V. Glukhikh A. E. Shkuro N. M. Mukhin E. I. Ostanina I. G. Grigorov O. V. Stoyanov 《Polymer Science Series D》2014,7(2):122-126
The effect of vinylacetate unit content in sevilen used as a polymer matrix or polyethylene compatibilizer on the properties of wood-polymer composites with a thermoplastic binders and filler of plant origin is studied. It is shown that the introduction of vinylacetate units decreases the tensile strength, contact elastic modulus, Brinell hardness, and water absorption of the composites, but increases the relative tensile elongation and impact viscosity without notch. 相似文献
22.
E. V. Sechko R. M. Khuzakhanov L. F. Stoyanova I. A. Starostina O. V. Stoyanov 《Polymer Science Series D》2011,4(3):149-157
Mixtures of low-density polyethylene and ethylene-vinyl acetate (EVA) copolymer are studied. It is shown that the adhesion
value is defined by the polymer that forms a dispersion medium in the adhesive compositions and the type of fracture depends
on the competing influence of the physical and mechanical parameters and the reduced acidity parameter of the polymer, which
forms a continuous phase. 相似文献
23.
A. A. Petukhov S. S. Kizhaev S. S. Molchanov N. D. Stoyanov Yu. P. Yakovlev 《Technical Physics》2012,57(1):69-73
The temperature dependences of the electrical and electroluminescent properties of InAsSbP/InAsSb/InAsSbP heterostructure
LEDs (λ ≈ 3.8−4.0 μm) are studied in the temperature interval 20–200°C. It is shown that the radiation power decreases with
increasing temperature in a superexponential manner and that this decrease is associated primarily with a rise in the rate
of Auger recombination. The position of the maximum in the radiation spectrum varies with temperature nonmonotonically, since
radiative recombination is observed both in the active region and in the wide-gap layer. At room temperature, current through
the heterostructure is tunneling current irrespective of the applied voltage polarity. As the temperature rises, either the
thermal emission of charge carriers appears (direct bias) or the diffusion current becomes significant (reverse bias). 相似文献
24.
Grimes CA Stoyanov PG Liu Y Tong C Ong KG Loiselle K Shaw M Doherty SA Seitz WR 《Journal of physics D: Applied physics》1999,32(12):1329-1335
A new type of in situ, remotely monitored magnetism-based sensor is presented that is comprised of an array of magnetically soft, magnetostatically-coupled ferromagnetic thin-film elements or particles combined with a chemically responsive material that swells or shrinks in response to the analyte of interest. As the chemically responsive material changes size the distance between the ferromagnetic elements changes, altering the inter-element magnetostatic coupling. This in turn changes the coercive force of the sensor, the amplitude of the voltage spikes detected in nearby pick-up coils upon magnetization reversal and the number of higher-order harmonics generated by the flux reversal. Since the sensor is monitored through changes in magnetic flux, no physical connections such as wires or cables are needed to obtain sensor information, nor is line of sight alignment required as with laser telemetry; the sensors can be detected from within sealed, opaque or thin metallic enclosures. 相似文献
25.
In the present paper the solutions of the quantum field problem for the free scalar massless field in two-dimensional space time are constructed. It is shown that the fields obtained cannot vanish at space-like infinity. The latter fact implies the existence of two conserved charge operators. The transformation properties of these solutions under the two-dimensional Lorentz group are examined. 相似文献
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29.
A. A. Efremov A. I. Zagidullin M. V. Kolpakova R. M. Garipov O. V. Stoyanov 《Polymer Science Series D》2008,1(4):244-248
Organosilicon compounds used to improve the strength and adhesion properties, as well as the thermal stability, of epoxy compositions are reviewed. Properties of composition on the basis of bisphenol A-based ED-20 resin cured with a KrOOT-1 silicon-containing amine are described. 相似文献
30.
S. A. Bogdanova O. R. Shashkina V. P. Barabanov G. P. Belov O. V. Stoyanov 《Polymer Science Series D》2011,4(2):71-77
The interconnection of the surface energy characteristics of polymers in a wide range of acid-base constituents of the free
surface energy and their adhesive interaction with adducts of ethylene oxide and isononylphenol was investigated. It was shown
that the content of the polar groups in the polymer surface layer and the length of the oxyethylene chain additively influence
the wetting ability and the work of adhesion. The peculiarities of the adhesive interaction of high pressure polyethylene
with oxyethylated compounds depending on the thermal oxidation of polymer and the acidity parameters of the surface were revealed. 相似文献