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1.
O. Slisenko E. Lebedev P. Pissis A. Spanoudaki E. Kontou O. Grigoryeva 《Journal of Thermal Analysis and Calorimetry》2006,84(1):15-19
The structure-property relationships of thermoplastic
polymer blends based on poly(ether-urethane) ionomer (PEUI) and ion-containing
styrene-acrylic acid copolymer (S-co-AA(K))
have been investigated by using DMTA, DSC and TGA, as well as tensile tests.
Convergence of the glass transition temperature (Tg)
values of the PEUI and the S-co-AA(K) components
in the blends studied, as compared to the individual polymers, was found and
explained by improving compatibility of the components due to increasing effective
density of physical networks formed by ion-dipole and ion-ion interactions
of ionic groups of the components. Character of E'=f(T) and E'=f(T) dependencies confirms the increase of the effective
density of physical networks in the compositions studied compared to individual
PEUI and S-co-AA(K). Improvement of end-use
properties, i.e. thermal stability and tensile properties has been found for
the PEUI/S-co-AA(K) compositions with lower
content of S-co-AA(K) (i.e. <10 mass%)
and explained by formation of additional network of intermolecular ionic bonds
between the functional groups of PEUI and S-co-AA(K). 相似文献
2.
S. V. Grigoriev N. A. Grigoryeva K. S. Napol’skii A. P. Chumakov A. A. Eliseev I. V. Roslyakov H. Eckerlebe A. V. Syromyatnikov 《JETP Letters》2011,94(8):635-641
Magnetic properties of spatially ordered arrays of interacting nanofilaments have been studied by means of small-angle diffraction
of polarized neutrons. Several diffraction maxima or rings that correspond to the scattering of the highly ordered structure
of pores/filaments with hexagonal packing have been observed in neutron scattering intensity maps. The interference (nuclear-magnetic)
and pure magnetic contributions to the scattering have been analyzed during the magnetic reversal of the nanofilament array
in a field applied perpendicular to the nanofilament axis. The average magnetization and the interference contribution proportional
to it increase with the field and are saturated at H = H
S
. The magnetic reversal process occurs almost without hysteresis. The intensity of the magnetic contribution has hysteresis
behavior in the magnetic reversal process for both the positive and negative fields that form the field dependence of the
intensity in a butterfly shape. It has been shown that this dependence is due to the magnetostatic interaction between the
filaments in the field range of H ≤ H
S
. A theory for describing the magnetic properties of the arrays of interacting ferromagnetic nanofilaments in the magnetic
field has been proposed. 相似文献
3.
Bashutin O. A. Grigoryeva I. G. Korf A. N. Savelov A. S. Salakhutdinov G. Kh. 《Physics of Atomic Nuclei》2020,83(10):1445-1448
Physics of Atomic Nuclei - In this paper, we describe a small-size magnetic spectrometer of electrons that allowed studying the spectral composition of electron emission in the energy range of... 相似文献
4.
Dubitskiy I. S. Grigoryeva N. A. Mistonov A. A. Valkovskiy G. A. Sapoletova N. A. Grigoriev S. V. 《Physics of the Solid State》2017,59(12):2464-2475
The structure of surface layers of thin metal inverse opals has been studied first by the grazing-incidence small-angle X-ray scattering technique. Contributions of the form factor and structure factor to the small-angle diffraction pattern have been separated using a numerical model of the scattering process. The complementary use of the small-angle X-ray scattering and grazing-incidence small-angle X-ray scattering techniques has provided independent information about the bulk and surface properties of the samples and allowed a type of defect in the investigated structures to be determined. The measurement results have been verified by atomic force microscopy.
相似文献5.
A theory has been constructed that strictly describes the spectrum of dipole-exchange spin waves in an arbitrarily magnetized anisotropic ferrite waveguide with a rectangular cross section. The theory takes into account the spatial inhomogeneity of the internal magnetic field in the waveguide cross section. The influence of parameters of the ferrite waveguide on the distribution of the internal magnetic field in the waveguide cross section is analyzed. The dispersion characteristics of two waveguide types most widely used in practice are investigated. The dipole-exchange spin wave spectra calculated for a transversely magnetized waveguide are presented and the distributions of the dynamic magnetization in the waveguide cross section for several types of volume and localized spin-wave modes are constructed. 相似文献
6.
Rimma V. Golovnya Diana N. Grigoryeva Alexei V. Vasilyev 《Journal of separation science》1991,14(11):741-744
The enthalpy and entropy of sorption of methylene units in the homologous series of n-alkyl acetates; methyl, n-butyl, and phenyl n-alkyl ketones; and the methyl esters and chloroanhydrides of n-aliphatic carboxylic acids have been determined on an SE-54 capillary column. The enthalpy of sorption of the first methylene unit is anomalously high when the growing n-alkyl chain is connected directly to a carbonyl group. This effect is a result of intramolecular interaction between neighboring methyl and carbonyl groups. It has been shown by measurement of the enthalpy and entropy of sorption of the difluoromethylene unit in the series of n-hexyl esters of perfluorinated carboxylic acids that for these compounds the effect is absent. The intramolecular interaction was found to increase in the order methyl butyl ketone < methyl phenyl ketone < methyl acetate < acetyl chloride < acetone. 相似文献
7.
Summary A thermodynamic criterion, Q, is suggested which permits to estimate the difference in the functional group energy of interactions for two different stationary phases. The linear dependence of Q on the homolog number m of any series Rm X can be used as the thermodynamic criterion for the identification of substances by GC analysis.Enlarged text of the paper presented at the Fourth Danube Symposium on Chromatography, Bratislava, Czechoslovakia, September 1983. 相似文献
8.
M. M. Grigoryeva G. V. Kuznetsov P. A. Strizhak 《Journal of Engineering Thermophysics》2011,20(2):192-200
The nonlinear nonstationary problem of heat and mass transfer at ignition of an overloaded cable line that penetrates from
one room to another through a partition is numerically solved. Dependences of the ignition delay time of a mixture of oxidizer
and thermal decomposition components of a cable sheath on the current load and also on the geometrical sizes and the partition
material are found. 相似文献
9.
The results obtained using simple models of combined heat and mass transfer in nonisothermal vapor or gas absorption by aqueous
solutions are generalized. The models take into account specific properties of two-phase binary systems used in absorbers
of thermotransformers (heat pumps and refrigerators). Some authors have already cited certain of the results, including criterial
dependences obtained via exact solutions, in reference books and monographs. This paper represents a wider spectrum of problems.
The Russian, more detailed version of the article, was published as a book. 相似文献
10.
N. A. Vasilyeva M. S. Grigoryeva V. V. Grebenev A. E. Voloshin 《Crystallography Reports》2013,58(4):646-650
Optically homogeneous mixed K2Ni x Co(1 ? x)(SO4)2 · 6H2O crystals are grown from solutions of different compositions by the temperature-reduction technique in static and dynamic regimes. The optical characteristics of the grown crystals are measured: transmittance reaches 80% in the wavelength range of 240–290 nm and no more than 9% in the visible spectral range. The thermal stability of the crystals is studied. It is established that the thermal stability of mixed K2Ni x Co1 ? x (SO4)2 · 6H2O crystals is higher than that of K2Co(SO4)2 · 6H2O crystal. The defects of the mixed crystals grown in static and dynamic regimes are investigated by X-ray topography. 相似文献