30 Result(s)

Article

Development of Materials Based on Poly(lactic acid) and Copper(II) Sulfate Impregnated by the Crazing Method

The common approach to creating antimicrobial polymer materials is the distribution of a bactericidal additive in a material by mixing the additive with a solution or a melt of the polymer. This work proposes ...

S. D. Brovina, E. E. Mastalygina, E. S. Trofimchuk, A. A. Popov in Colloid Journal (2024)

Article

Polylactide Degradation in the Presence of Members of the Genus Bacillus

Microorganisms of the genus Bacillus were shown to have different effects on the degradation of polylactide packaging material. The degradation experiment was carried out on an agar medium at a temperature of 55°...

V. V. Mironov, E. S. Trofimchuk, V. V. Ostrikova, A. V. Plutalova… in Microbiology (2023)

Article

Composite Mineral–Polymer Materials with Cation-Substituted Calcium Phosphates

Powders of copper-, zinc-, manganese-substituted tricalcium phosphates (TCP) are synthesized; the composition and structure of the obtained compounds are studied. It is shown how copper, zinc, and manganese io...

A. A. Forysenkova, P. V. Slukin, E. S. Trofimchuk… in Inorganic Materials: Applied Research (2023)

Article

Solid-Phase Biodegradation of Polylactides (Review)

The main problem associated with the use of polylactides (PLAs) in various fields is the requirement for their controlled degradation in the composition of waste. However, the possibilities of biodegradation o...

V. V. Mironov, E. S. Trofimchuk, N. A. Zagustina… in Applied Biochemistry and Microbiology (2022)

Article

Low-Temperature Synthesis of Barium Titanate in a Mesoporous Polyethylene Matrix

A nanocomposite based on high-density polyethylene with 13–15 wt % of barium titanate was obtained by the low-temperature synthesis of the inorganic component directly in the mesopores of an oriented polymer m...

E. S. Trofimchuk, M. A. Moskvina, V. G. Shevchenko… in Inorganic Materials: Applied Research (2022)

Article

Features of Thermo-Oxidative Degradation and Pyrolysis of Nanocomposites Based on Porous Polyethylene and Silica

Effect of the structural mechanical modification via the crazing mechanism and composition of films based on HDPE nanocomposites and highly dispersed silica particles on the thermo-oxidative degradation and py...

E. O. Fomin, E. S. Trofimchuk, M. A. Moskvina… in Polymer Science, Series B (2022)

Article

Porous matrixes based on polyvinylpyrrolidone containing calcium phosphates for medical application

A number of materials based on biocompatible polymers (polyvinylpyrrolidone and sodium alginate) with hydroxyapatite and dicalcium phosphate dihydrate were developed. The properties of prepared materials were ...

I. V. Fadeeva, A. A. Forysenkova, E. S. Trofimchuk… in Russian Chemical Bulletin (2022)

Article

Memory Effect in Porous Polyethylene Films Preliminarily Deformed in the Medium of Supercritical CO₂

The dynamics of recovery of the open porous structure in HDPE films, which are preliminarily uniaxially deformed in the medium of supercritical CO₂ followed by shrinkage in the longitudinal direction, upon their ...

A. O. Roenko, E. S. Trofimchuk, A. V. Efimov, G. A. Armeev… in Polymer Science, Series A (2021)

Article

Polylactide-Based Porous Materials: Synthesis, Hydrolytic Degradation Features, and Application Areas

Polylactide-based materials are often considered an alternative to materials produced from traditionally hardly degradable polymers. Porous polylactide membranes, matrices, and scaffolds are especially attract...

E. S. Trofimchuk, V. V. Potseleev, M. A. Khavpachev… in Polymer Science, Series C (2021)

Article

Composite Materials Based on Polyvinylpyrrolidone and Calcium Phosphates for Medicine

Mineral-polymer composites based on PVP and hydroxyapatite (HA) are obtained by in situ deposition in solutions of polyvinylpyrrolidone (PVP). The composites are presented in the form of films of hydrogels. Du...

I. V. Fadeeva, A. S. Fomin, G. A. Davydova… in Inorganic Materials: Applied Research (2021)

Article

Production of Porous Poly(p-dioxanone) Fibers during the Neck Propagation in Self-Excited Oscillation Mode

Features of the plastic deformation of poly(p-dioxanone) fibers in air were studied. The neck propagation in the deformation speed range 0.2–15 mm/min was shown to occur in the self-excited oscillation mode. It w...

M. A. Khavpachev, E. S. Trofimchuk, A. V. Efimov… in Doklady Physical Chemistry (2020)

Article

Template Synthesis of Calcium Phosphates in Nanoporous Polyolefin Films Obtained via Crazing Mechanism

An alternative method for production of hybrid organic–inorganic nanocomposites based on porous polyolefin films (isotactic polypropylene, high density polyethylene), deformed via crazing mechanism in physical...

M. A. Moskvina, E. S. Trofimchuk, F. I. Grabovenko… in Inorganic Materials: Applied Research (2020)

Article

Methylcellulose Films Partially Crosslinked by Iron Compounds

An original method is proposed for the production of methylcellulose-based film materials. The method is based on obtaining a homogeneous MC mixture with sodium alginate in an aqueous solution and subsequently...

I. V. Fadeeva, E. S. Trofimchuk, E. V. Rogatkina… in Inorganic Materials: Applied Research (2019)

Article

Nanocomposites Based on Porous Polylactide, Obtained by Crazing Mechanism in Water–Ethanol Solutions, and Calcium Phosphates

Systematic investigations of uniaxial deformation of an amorphous isotropic polylactide film in water–ethanol solutions of different composition are carried out and optimal conditions for polymer deformation b...

E. S. Trofimchuk, A. V. Efimov, M. A. Moskvina, O. A. Ivanova… in Polymer Science, Series A (2018)

Article

Nanocomposites based on polyethylene and modified silica phase

Polymer nanocomposites based on solvent-crazed porous matrices of polyethylene of high density and modified phases of silica with a second component homogeneously distributed over the volume of the polymer hav...

N. I. Nikonorova, E. S. Trofimchuk, I. B. Meshkov… in Nanotechnologies in Russia (2015)

Article

Effect of titanium dioxide and silicon dioxide on the thermal stability of isotactic polypropylene deformed via solvent-crazing mechanism

The effect of a finely divided structure created via the mechanism of delocalized crazing on the processes of thermo-oxidative degradation of isotactic polypropylene has been studied. It has been shown that th...

E. S. Trofimchuk, V. V. Polyanskaya, M. A. Moskvina… in Polymer Science Series A (2015)

Article

Preparation of nanoporous polyolefin films in supercritical carbon dioxide

The peculiarities of uniaxial deformation of semicrystalline polyolefins were studied using high-density polyethylene and isotactic polypropylene as an example in carbon dioxide at 35–75°C and pressures of 0.1...

E. S. Trofimchuk, A. V. Efimov, L. N. Nikitin… in Russian Journal of Physical Chemistry B (2014)

Article

Features of uniaxial tension of amorphous poly-L-lactic acid in liquid media

E. S. Trofimchuk, D. K. Mal’tsev, N. G. Sedush, A. V. Efimov… in Doklady Physics (2014)

Article

Obtaining nanoporous inorganic sheets

An original technique to obtain porous sheets from various inorganic substances (silicon dioxide, hydroxyapatite, and silver) using polymer matrices whose high-disperse structure is formed by the crazing mecha...

E. S. Trofimchuk, N. I. Nikonorova, E. A. Nesterova… in Nanotechnologies in Russia (2012)

Article

Poly(ethylene terephthalate) deformation in a supercritical xenon medium

E. S. Trofimchuk, L. N. Nikitin, A. V. Efimov… in Doklady Physical Chemistry (2012)