21 Result(s)

Article

Hydrolytic polycondensation of diethoxymethylsilane under pressure

The process of hydrolytic polycondensation of diethoxymethylsilane in water under pressure was investigated without the use of organic solvents in non-catalytic conditions and in carbonic acid. It is demonstra...

A. A. Kalinina, T. A. Pryakhina, E. V. Talalaeva… in Russian Chemical Bulletin (2022)

Article

Effect of reactionary capable siloxane compatibilizer on the properties of blends of ethylene propylene diene and siloxane rubbers

Polydimethyl(methylvinyl)siloxane with long-chain hydrocarbon fragments was synthesized at a sequence of chemical reactions. The resulting graft copolymer was used as a compatibilizer of ethylene propylene die...

O. A. Serenko, T. A. Pryakhina, V. G. Vasil’ev, M. I. Buzin… in Russian Chemical Bulletin (2021)

Article

Formation of a physical crosslinked structure in polydimethylsiloxanes modified with long-chain hydrocarbon substituents with polar fragments

The dependence of rheological properties (viscosity and dynamic moduli G′ and G″) and time for formation of a physical network for polydimethylsiloxanes bearing ester and amide groups in aliphatic substituents at...

V. G. Vasil’ev, T. A. Pryakhina, D. I. Shragin… in Polymer Science, Series B (2017)

Article

Synthesis, rheological, and thermal properties of polydimethylsiloxanes modified with long-chain hydrocarbon substituents with polar fragments

A number of polydimethylsiloxanes modified with long-chain hydrocarbon substituents with ester or benzylamide terminal groups was synthesized by hydrosilylation and polymeranalogous reactions. The copolymers w...

T. A. Pryakhina, D. I. Shragin, Yu. N. Kononevich… in Russian Chemical Bulletin (2015)

Article

Synthesis and thermal properties of polydimethylsiloxanes modified by decyl and methylundecylenate substituents

A series of polydimethylsiloxanes modified by long-chain hydrocarbon substituents, including those containing terminal ester groups, was synthesized. The structures of the copolymers were confirmed by the data...

T. A. Pryakhina, D. I. Shragin, T. V. Strelkova, V. M. Kotov… in Russian Chemical Bulletin (2014)

Article

Synthesis and properties of fluorosilicon compounds for protection of cultural monuments from harmful environmental exposure

Methods for the synthesis of perfluorocarboxylic acid derivatives with reactive trialkoxysilyl groups soluble in organic and organofluorine (1,1,2-trichlorotrif1uoroethane, etc.) solvents have been developed. The...

A. A. Yarosh, S. P. Krukovsky, A. M. Sakharov, M. Yu. Popovich… in Russian Chemical Bulletin (2014)

Article

Nanocomposites based on epoxy resin and silicon dioxide particles

The cure of an epoxy resin (3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate) in the presence of silica nanoparticles modified by 3-(triethoxysilyl)propylsuccinic anhydride has been studied. Optimal ...

A. I. Barabanova, P. L. Shevnin, T. A. Pryakhina, K. A. Bychko… in Polymer Science Series A (2008)

Article

Rheological properties of solutions and gels of combined systems hydrophobically modified polyacrylamides-new viscoelastic cationic surfactants

The rheological properties (viscosity and dynamic elasticity modulus) of solutions and gels of combined systems composed of hydrophobically modified polymers containing main-chain charged groups or lacking the...

L. Z. Rogovina, V. G. Vasil’ev, V. N. Matveenko… in Polymer Science Series A (2007)

Article

Molecular-mass characteristics and association behavior of weakly charged hydrophobically modified poly(acrylamides)

The evolution of compositional heterogeneity and molecular-mass distribution in the course of micellar polymerization of weakly charged hydrophobically modified poly(acrylamides) has been studied. The relation...

I. V. Blagodatskikh, O. V. Vasil’eva, T. A. Pryakhina… in Polymer Science Series A (2007)

Article

Rheology of Hydrophobically Modified Polymers

A study has been made of the rheological characteristics of the aqueous and water‐salt solutions and gels of one class of hydrophobically modified polymers: acrylamide copolymers with a hydrophobic monomer whi...

L. Z. Rogovina, V. G. Vasil'ev… in Journal of Engineering Physics and Thermop… (2003)

Article

Some peculiarities of hydrosilylation of α,ω-divinyloligosilanes

The stability of Si-Si bonds in linear and cyclic permethyloligosilanes and in α,ω-divinyloligosilanes under conditions of hydrosilylation in the presence of the Speier's catalyst was studied. Polycarbosilanes...

T. A. Pryakhina, A. I. Chernyavskii, T. V. Strelkova… in Russian Chemical Bulletin (1996)

Article

Synthesis of 1,2-bicyclosiloxanylethanes

The hydrosilylation of pentamethylvinylcyclotrisiloxane by hydromethylphenylcyclotetrasiloxanes gives new bicyclosiloxanylethanes. In the presence of basic initiators, these compounds form cross-linked polymers.

A. A. Zhdanov, V. M. Kotov, T. A. Pryakhina in Bulletin of the Academy of Sciences of the… (1986)

Article

Synthesis of methylphenylbicyclocarbosiloxanes and study of their properties

1. A series of new organosiloxanes with end cyclotetrasiloxanylethyl fragments was obtained by hydrosilylation o...

A. A. Zhdanov, V. M. Kotov, T. A. Pryakhina in Bulletin of the Academy of Sciences of the… (1985)

Article

Synthesis of organobicyclosiloxanes with carbosiloxane and carbosilane groups between the rings

1. Hydrosilylation of methylvinylsiloxanes with dihydrosiloxanes and dihydrosilanes in the presence of H₂PtCl₆ h...

A. A. Zhdanov, V. M. Kotov, B. D. Lavrukhin… in Bulletin of the Academy of Sciences of the… (1984)

Article

Hydride addition of diorganosilanes to organovinylcyclosiloxanes

The hydride addition of methylphenylsilane and diphenylsilane to pentamethylvinylcyclotrisiloxane and heptamethylvinylcyclotetrasiloxane, in the presence of H₂PtCl₆, leads to the formation of bis (organocyclosilo...

K. A. Andrianov, V. M. Kotov… in Bulletin of the Academy of Sciences of the… (1978)

Article

NMR analysis of the stereoisomers of methylvinylphenylcyclotrisiloxanes and cyclotetrasiloxanes

1. Certain methylphenylvinylcyclosiloxanes have been synthesized.

K. A. Andrianov, B. D. Lavrukhin… in Bulletin of the Academy of Sciences of the… (1978)

Article

Synthesis of organobicyclocarbosiloxanes

1. The hydride addition of dimethylchlorosilane to organodivinylcyclotetrasiloxanes in the presence of H₂PtCl₆ h...

K. A. Andrianov, V. M. Kotov… in Bulletin of the Academy of Sciences of the… (1977)

Article

Synthesis of organobicyclosiloxanes with carbosiloxane groups between the rings

1. The hydride addition of dihydrosiloxanes to methylvinylcyclosiloxanes in the presence of catalytic amounts of...

K. A. Andrianov, V. M. Kotov… in Bulletin of the Academy of Sciences of the… (1975)

Article

Hydrolytic polycondensation and exchange reaction of methyltrichlorosilane with sodium metasilicate

A study was made of the hydrolytic polycondensation and exchange reaction of methyltrichlorosilane with sodium metasilicate and it was shown that when the reaction proceeds in alkaline medium (pH> 7) the pH of...

K. A. Andrianov, T. V. Vasil'eva… in Bulletin of the Academy of Sciences of the… (1975)

Article

Synthesis of organocyclotetrasiloxanes with carbosiloxane groups

1. The hydride addition of hydrosiloxanes to alkyl(aryl)vinylcyclotetrasiloxanes gave a number of organocyclotet...

K. A. Andrianov, V. M. Kotov… in Bulletin of the Academy of Sciences of the… (1975)