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Krutov S.M.,Saint Petersburg State University | Voznyakovskii A.P.,Lebedev Research Institute of Synthetic Rubber | Gribkov I.V.,GCE Group | Shugalei I.V.,Saint Petersburg State Polytechnic University
Russian Journal of General Chemistry | Year: 2014

The review considers problems related to processing of lignin-containing wastes. © 2014 Pleiades Publishing, Ltd.

Voznyakovskii A.P.,Lebedev Research Institute of Synthetic Rubber | Ginzburg B.M.,Russian Academy of Sciences | Rashidov D.,Tajik National University | Tochil'Nikov D.G.,Russian Academy of Sciences | Tuichiev Sh.,Tajik National University
Polymer Science - Series A | Year: 2010

The effect of modifying additives based on detonation nanodiamonds on the tribological characteristics of polyurethane rubber is studied. Introduction of modifying additives based on detonation nanodiamonds (0.5 wt %) leads to a marked improvement in the antifriction and wear-resistance characteristics under conditions of boundary sliding friction for steel and for lubrication with water. The attained tribological characteristics (total energy loss for friction, weight loss of polymer during tribological contact, maximum admissible working pressure) are well (∼300%) above the corresponding characteristics of foreign analogs. Changes in the tribological characteristics of the formed nanocomposite material are observed, but the elastic and strength characteristics remain unchanged. © 2010 Pleiades Publishing, Ltd.

Rozentsvet V.A.,Russian Academy of Sciences | Korovina N.A.,Russian Academy of Sciences | Ivanova V.P.,Lebedev Research Institute of Synthetic Rubber | Kuznetsova M.G.,RAS Institute of Chemistry | Kostjuk S.V.,Belarusian State University
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2013

The microstructure of poly(1,3-pentadiene) synthesized by cationic polymerization of 1,3-pentadiene with tBuCl/TiCl4 initiating system is analyzed using one-dimensional- and two-dimensional-NMR spectroscopy. It is shown that unsaturated part of chain contains only homo and mixed dyads with trans-1,4-, trans-1,2-, and cis-1,2-structures with regular and inverse (head-to-head or tail-to-tail) enchainment, whereas cis-1,4- and 3,4-units are totally absent. The new quantitative method for the calculation of content of different structural units in poly(1,3-pentadiene)s based on the comparison of methyl region of 13C NMR spectra of original and hydrogenated polymer is proposed. The signals of tert-butyl head and chloromethyl end groups are identified in a structure of poly(1,3-pentadiene) chain and the new approaches for the quantitative calculation of number-average functionality at the α- and ω-end are proposed. © 2013 Wiley Periodicals, Inc.

Kalinin A.V.,Lebedev Research Institute of Synthetic Rubber | Gavrilov A.S.,Lebedev Research Institute of Synthetic Rubber
Russian Journal of Applied Chemistry | Year: 2012

A polyether oligomer with terminal hydroxy groups was modifi ed in succession with 2, 4-toluene diisocyanate, allyl alcohol, and trimethoxysilane (hydrosilation). The modifi ed oligomer was vulcanized by the method used for vulcanization of organosilicon elastomers. The effect of additions of SF-2 fullerene-containing black on the mechanical properties of the vulcanizate was examined. © 2012 Pleiades Publishing, Ltd.

Rodin V.M.,Lebedev Research Institute of Synthetic Rubber | Lovchikov V.A.,Lebedev Research Institute of Synthetic Rubber
Polymer Science - Series B | Year: 2014

A model of the formation of sequences of stereochemical configurations in chain macromolecules that was proposed by Coleman and Fox is considered. Previously, it was thought that this model can not be represented by Markov statistics of any order. On the basis of an analysis of the model equations, it is shown that these sequences can be represented by Markov statistics and describe chain growth approximately with a precision similar to that of the classical second-order Markov model, widely used to describe stereosequences. © 2014, Pleiades Publishing, Ltd.

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