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Moscow, Russia

D. Mendeleev University of Chemical Technology of Russia has its roots going far back into the 19th century. Back then, professors from the Imperial Moscow Technical School came up with an idea of establishing an Industrial College in Moscow to train “Chemical and Mechanical Engineer Assistants”.This proposal received an enormous support on behalf of the Moscow City Duma on February 9, 1880, which passed a Decision to Build an Industrial College in Moscow to Commemorate the 25th Anniversary of the Russian Emperor Alexander II's Reign. Wikipedia.

Rakov E.G.,Mendeleev University of Chemical Technology
Russian Chemical Reviews | Year: 2013

Publications concerning research on unique mate- rial made of carbon nanotubes (CNTs) aligned perpendicu- lar to the substrate surface, namely, CNT forest, are analyzed and summarized. The morphology, volume and surface density of CNT forest, methods of its synthesis and modification, as well as the properties and potential fields of application are considered. The bibliography includes 679 references. © 2013 Russian Academy of Sciences and Turpion Ltd.

Zharikov E.V.,Mendeleev University of Chemical Technology
Journal of Crystal Growth | Year: 2012

The present review deals with the novel developments in melt growth techniques which have arisen mostly within recent five-ten years and focuses on recent progress in growing bulk crystals of dielectrics, however, many developments could be easily applied to the semiconductor growth technology. The scaling of size and yield of crystals grown from the melt, and various ways and tricks to improve crystal perfection via homogenization of melt composition and governing the heat and mass transfer are under consideration. Particular developments such as low-thermal gradient and low-melt level growth techniques, governing by heat field rotation and applying of low-frequency vibration, as well as the use of double crucibles and submerged baffles are considering. The paper also discusses the current problems of bulk crystal growth due to the competition with arisen alternative technologies of manufacture the bulk crystalline or quasi-crystalline materials including transparent ceramics and glass-ceramics as well as the solid-state single crystal growth technology. © 2011 Elsevier B.V.

Rakov E.G.,Mendeleev University of Chemical Technology
Russian Chemical Reviews | Year: 2013

Studies of materials consisting of carbon nano-tubes or containing them have been analyzed and generalized. Classification of these materials is proposed, their general features and main types are considered, and individual examples are presented. The bibliography includes 372 references. © 2013 Russian Academy of Sciences and Turpion Ltd.

Bartashevich E.V.,South Ural State University | Tsirelson V.G.,Mendeleev University of Chemical Technology
Physical Chemistry Chemical Physics | Year: 2013

The polarization effects associated with halogen bonding for the series of charge-transfer complexes Dm⋯X-Y, where donor molecules D m = NH3, H2O, H2S, C 2H4, CO and X-Y = Cl2, ClF, Br2, BrCl, ICl, I2, are characterized in terms of the quantum theory of atoms in molecules using the B3LYP/6-311** Kohn-Sham wave functions. We study the electrostatic potential features of separate donor and acceptor molecules, the change in atomic charges as well as the atomic electric dipole moments and their components, and the intra-atomic electron density dipole polarization and the bonding dipole moments resulting from the electron density redistribution between the molecules in the charge-transfer complexes. The equation linking the most negative electrostatic potential values in the donor molecules and the most positive values in dihalogen molecules with the stretching force constants was found using two-factor regression. It is demonstrated that the dipole polarization of the acceptor atom mirrors the strength of halogen bonding in complexes in a series of different donors and acceptors. An exponential relationship between the magnitude of the total atomic electric dipole moment of the acceptor atom and the intermolecular stretching force constant is established for weakly bounded complexes. © 2013 the Owner Societies.

Feldstein M.M.,Mendeleev University of Chemical Technology | Siegel R.A.,University of Minnesota
Journal of Polymer Science, Part B: Polymer Physics | Year: 2012

Pressure-sensitive adhesives (PSAs) are finding increasing applications in various areas of industry and medicine. PSAs are a special class of viscoelastic polymers that form strong adhesive joints with substrates of varying chemical nature under application of light external bonding pressures (1-10 Pa) over short periods of time (1-5 s). To be a PSA, a polymer should possess both high fluidity under applied bonding pressure, to form good adhesive contact, and high cohesive strength and elasticity, which are necessary for resistance to debonding stresses and for dissipation of mechanical energy at the stage of adhesive bond failure under detaching force. For rational design of novel PSAs, molecular insight into mechanisms of their adhesive behavior is necessary. As shown in this review, strength of PSA adhesive joints is controlled by a combination of diffusion, viscoelastic, and relaxation mechanisms. At the molecular level, strong adhesion is the result of a narrow balance between two generally conflicting properties: high cohesive strength and large free volume. These conflicting properties are difficult to combine in a single polymer material. Individually, high cohesive interaction energy and large free volume are necessary but insufficient prerequisites for PSA strength. Evident correlations are observed between the adhesive bond strengths of different PSAs, and their relaxation behaviors are described by longer relaxation times. Innovative PSAs with tailored properties can be produced by physical mixing of nonadhesive long- and short-chain linear parent polymers, with groups at the two ends of the short chains complementary to the functional groups in the recurring units of the long chains. Although chemical composition and molecular structure of such innovative adhesives are unrelated to those of conventional PSAs, their mechanical properties and adhesive behaviors obey the same general laws, such as the Dahlquist's criterion of tack. © 2012 Wiley Periodicals, Inc.

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