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Tomsk, Russia

Smirnova O.V.,OOO NIOST | Sukhova T.A.,RAS Institute of Problems of Chemical Physics | Solov'Ev M.V.,Moscow State University | Galibeev S.S.,OOO NIOST | And 3 more authors.
Russian Journal of Inorganic Chemistry | Year: 2011

Titanium(4+) and zirconium(4+) complexes with pyridinedicarboxylic acid derivatives have been synthesized. The composition and structure of the synthesized 2,6-bis(diphenylhydroxymethyl)pyridine complexes have been corroborated by NMR and IR spectroscopy, and elemental analysis. The complexes activated with methylaluminoxane (MAO) are catalytically active in ethylene polymerization, Depending on the Ti/AlMAO ratio, the catalytic activity of the complexes varies between 90 and 420 kg PE/mol Ti h atm. © 2011 Pleiades Publishing, Ltd. Source

Gagieva S.Ch.,Moscow State University | Tuskaev V.A.,Moscow State University | Smirnova O.V.,OOO NIOST | Galibeev S.S.,OOO NIOST | And 2 more authors.
Polymer Science - Series B | Year: 2011

The catalytic activity of the titanium(IV) dichloride complex with the (4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-bis(perfluorophenyldimethanol) ligand in the presence of a cocatalyst (polymethylaluminoxane, triethylaluminum, or triisobutylaluminum) in the polymerization of higher α-olefins (1-hexene, 1-octene, 1-decene) is investigated. It is shown that, depending on the types of cocatalyst and monomer and the molar ratio of components of the catalytic system, high- or ultrahigh-molecular-mass poly(α-olefins) with M w = (4 × 105)-(3 × 106) can be prepared. The chain microstructure of polyhexene is examined. © 2011 Pleiades Publishing, Ltd. Source

Ashirov R.V.,OOO NIOST | Zemlyakov D.I.,OOO NIOST | Lyapkov A.A.,Tomsk Polytechnic University | Kiselev S.A.,OOO NIOST
Kinetics and Catalysis | Year: 2013

The kinetics of the metathesis polymerization of three isomeric 2,3-dicarbomethoxy-5-norbornenes on an original Hoveyda-Grubbs II type catalyst Has been investigated by 1H NMR spectroscopy. The activation energies of metathesis polymerization and the homopolymerization rate constants have been calculated for all esters from experimental data. The polymerization rate constant of endic acid dimethyl ester (endo,endo-2,3-dicarbomethoxy-5- norbornene) is almost two orders of magnitude lower than that of the reaction of exo,exo-2,3-dicarbomethoxy-5-norbornene. Selected parameters of the microstructure of the resulting polymers are presented. © 2013 Pleiades Publishing, Ltd. Source

Ryzhikova I.G.,OOO NIOST | Bauman N.A.,OOO NIOST | Volkov A.M.,OOO NIOST | Kazakov Yu.M.,OOO NIOST | Volfson S.I.,Kazan State Technological University
AIP Conference Proceedings | Year: 2014

The study concerned the effect of molecular-mass characteristics and Mooney viscosity of the initial EPDM rubber on the changes in the structure, impact strength and rheological properties of PP/EPDM blends as a result of their modification in a melt under the action of organic peroxide and peroxide-trimethylolpropane triacrylate (TMPTA) system. © 2014 AIP Publishing LLC. Source

Budeeva A.V.,OOO NIOST | Lemport P.S.,OOO NIOST | Turenko S.V.,OOO NIOST | Vol'Fson S.I.,k-Technology
Russian Journal of Applied Chemistry | Year: 2014

A promising ternary copolymer of styrene, isoprene, and butadiene, synthesized by anionic polymerization in solution, was subjected to chemical postpolymerization modification using the following branching and endcapping agents: tin and silicon tetrachlorides, N-methylpyrrolidone, and Michler's ketone. The combined method of chemical modification of the copolymer performed in the two-stream mode (branching and endcapping), with the subsequent mixing of the streams, is the most efficient. © 2014 Pleiades Publishing, Ltd. Source

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