S. M. Lomakin

S. M. Lomakin
Russian Academy of Sciences | RAS · Institute of Biochemical Physics

Doctor of Philosophy

About

191
Publications
17,792
Reads
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3,260
Citations
Citations since 2017
35 Research Items
1155 Citations
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2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
Introduction
Currently S. M. Lomakin works at the Institute of Biochemical Physics of the Russian Academy of Sciences in the field of polymer chemistry, degradation and flammability of polymers and the development of environmentally friendly flame retardants based on renewable raw materials.
Additional affiliations
January 1994 - present
Russian Academy of Sciences
Position
  • Principal Investigator
Education
January 1977 - January 1986
Semenov Institute of Chemical Physics
Field of study
  • Chemistry of polymers

Publications

Publications (191)
Article
Filled compositions of polylactide (PLA) with a reduced graphene oxide (RGO) at various components ratios were obtained by two independent methods: the solid-phase mixing of components under the action of shear strains and the liquid-phase synthesis in a chloroform solution with ultrasonic stirring. The influence of the structure of formed composit...
Article
Двумя независимыми способами — твердофазным смешением компонентов под действием сдвиговых деформаций и жидкофазным синтезом в растворе хлороформа при перемешивании ультразвуком получены наполненные композиции полилактида (ПЛА) с восстановленным оксидом графена (ВОГ) различного состава. Изучено влияние структуры образующихся композитов на комплекс и...
Article
Full-text available
Glycero-(9,10-trioxolane)-trioleate (ozonide of oleic acid triglyceride, OTOA) was introduced into polylactic acid (PLA) films in amounts of 5, 10, 30, 50, and 70% w/w. The morphological, mechanical, thermal, and water absorption properties of PLA films after the OTOA addition were studied. The morphological analysis of the films showed that the ad...
Article
Some low-molecular-weight substances are able to self-assemble into fiber-like structures (strings) to form gels. One of the examples of such substances is trifluoroacetylated alpha-aminoalcohols (TFAAAs) able to gelate in many organic solvents. Here we report the formation and describe the properties of a layer of an altered solvent covering the s...
Article
Full-text available
Composites of polylactide containing graphite nanoplates as a filler in the concentration range 1–20 wt% were prepared in methylene chloride using the sonication technique. The thermal characteristics and phase transitions were studied by DSC and TGA methods. The temperatures and heats of glass transition, crystallization, and melting were determin...
Article
This study was aimed to investigate the effect of reduced graphene oxide (rGO) on the pyrolysis of polylactide composites (PLA4042D/rGO) prepared in solution. GC-MS analysis of PLA4042D /rGO pyrolysis products showed that introduction of rGO into the composition with PLA leads to a significant change in the ratio of main degradation products. A sha...
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Full-text available
The effect of micro- and nanocellulose addition on the thermal properties of polyethylene compositions has been studied by means of thermogravimetric analysis and pyrolysis-gas chromatography-mass spectrometry. The main temperature characteristics of the thermo- and thermo-oxidative degradation of the compositions are determined. The influence of m...
Article
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A method for producing growth stimulants using liquid-phase catalytic oxidation of rice waste was tested, with an assessment of the composition of the resulting solution, active silicon, and bioassay. Laboratory studies have shown that solutions from rice waste synthesized by liquid-phase catalytic oxidation are promising for the preparation of pla...
Article
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Synthesized bio-flame retardants from plant materials. A comparative analysis of the flammability indices of polyester resin samples containing complex double flame retardants and single flame retardants of bioantipyrene, aluminum hydroxide and ammonium polyphosphate showed a non-additive improvement in flame retardant compositions consisting of do...
Article
Full-text available
В работе исследовано влияние наноразмерных наполнителей разного типа на механизм термодеструкции полиэтилена. Состав продуктов пиролиза композиционных материалов был определен методом хромато-масс-спектрометрии. Установлено, что введение в полиэтилен углеродных нано-наполнителей (углеродные нанотрубки, нанопластины графита, восстановленный оксид гр...
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Full-text available
The influence of different types of nanofillers on the mechanism of polyethylene thermal degradation is studied. The composition of the products of pyrolysis of composite material was evaluated using gas chromatography–mass spectrometry (GC–MS). It has been found that incorporating carbon nanofillers (carbon nanotubes, graphite nanoplates, and redu...
Article
The effect of boric acid (BA) on the thermal destruction of polyvinyl alcohol (PVA) was studied. The pyrolysis temperatures were chosen based on the thermogravimetric analysis data. The composition of the main products of pyrolysis was determined. The mechanisms of thermal destruction were proposed for PVA and its composite with BA. The observed ph...
Article
The influence of multiwalled carbon nanotubes (MWNTs) on the thermal and physical and mechanical properties of polysulfone (PSU) nanocomposites is studied in this work. It is found that adding MWNTs (up to 5 wt %) to the compounds with PSU leads to an insignificant increase in the tensile modulus and a growth in the dynamic modulus of PSU/MWNTs at...
Article
In this paper, we discuss promising systems for reducing the combustibility of polymeric materials taking the environmental safety of the polymer usage into account. Polymer nanocomposites containing nanocarbon fillers and layered silicates as additives that exhibit a synergistic effect on reducing the combustibility of traditional polymer thermopl...
Article
The effect of boron polyoxide on the thermal degradation of polyvinyl alcohol is studied. Based on the results of thermogravimetric analysis, a kinetic model of thermal degradation of boric acid and polyvinyl alcohol is proposed taking into account the catalytic nature of the dehydration process and accelerated carbonization. The characteristic fea...
Article
Full-text available
The photoinduced reactions of benzophenone (B) in biaxially oriented polypropylene (BOPP) were studied with nanosecond laser photolysis (N2 laser, λ337.1 nм). The first observed transient was a triplet state 3B*. Decay of 3B* led to a formation of a radical pair (RP) of BH• and R•, where R• is a radical formed by hydrogen abstraction from BOPP (RH)...
Article
A mathematical model of the overall kinetics of heat treatment of municipal solid waste was developed. The model considers the main initial substances and products of the reaction of municipal solid waste treatment at high temperatures (1300–1500°C) in a tubular flow reactor.
Article
Full-text available
Thermogravimetry is used to study the thermodestruction of nitrocellulose (NC) with various nitrogen contents at various heating rates. At high degrees of nitration and high heating rates of the sample, the reaction occurs in an explosion mode with a threshold of its weight loss depending on the temperature. To explain this behavior, it is assumed...
Article
A macrokinetic model of carbonaceous feedstock pyrolysis in a tubular reactor of variable cross section was constructed. It was shown that, to intensify the pyrolysis in such a tubular reactor, its diameter should vary depending on the viscosity of the reaction products.
Article
Studies of thermal and fire-resistant properties of the polyethylene/graphite nanoplates (PE-GNP) nanocomposites prepared by means of in situ polymerization are discussed.The key factor of influence of graphite nanoplates on the thermal degradation and combustion of PE-GNP nanocomposites is analyzed using the sets of the data acquired with the aid...
Article
Full-text available
The impact of graphite nanoslabs on thermal oxidation of polyethylene is studied via the methods of dynamic thermogravimetry and isothermal oxidation. Graphite nanoslabs are shown to exert an inhibiting effect on thermal oxidation of polyethylene, which leads to an increase in the induction period and in the oxygen-absorption rate. That there is an...
Article
The conversion of phenylone polymer (poly-m-phenylene isophthalamide) at 293 K under the action of a nitrogen dioxide−oxygen gaseous mixture and nitrogen dioxide and oxygen individually is studied by the ESR method. In the first case, aryliminooxyl and arylacylaminoxyl free radicals are recorded, whereas in the second, diarylaminoxyl and phenoxy fr...
Article
Full-text available
A mathematical model of carbonaceous feedstock pyrolysis in a countercurrent tubular reactor was proposed. It was shown that the pyrolysis in a tubular reactor in which porous carbonaceous feedstock is heated in a countercurrent flow of a heated gas can be highly efficient.
Article
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A mathematical model of unsteady-state carbonaceous feedstock pyrolysis in a multichannel tubular reactor was proposed. It was shown that the conversion of feedstock being heated at periodically varying temperature can exceed the conversion on heating at constant temperature. The main design parameters of the multichannel reactor were determined.
Article
A problem of optimal control of the temperature conditions of carbonaceous feedstock pyrolysis in a plug-flow reactor was formulated, and it was shown that the optimal temperature profile depends significantly on the ratio between the activation energies of the desired and side reactions and also on the type of the main pyrolysis reactions (consecu...
Article
The structural dynamic parameters of ultrafine fibrous matrices of poly-3-hydroxybutyrate (PHB) and composite mixtures of PHB with chitosan were studied by differential scanning calorimetry, EPR spectroscopy, and scanning electron microscopy. The melting enthalpy of PHB fibers considerably increased when a small amount of chitosan was added. Amorph...
Chapter
Structural-dynamic analysis based on combined thermophysical and molecular-mobility measurements via spin-probe ESR spectroscopy has been applied to films and fibrous matrixes based on poly(3-hydroxybutyrate). The dynamic behaviors of partially crystalline samples during deformation under conditions of electrospinning and cold rolling have been com...
Chapter
At oxidation 2-(N-acetylamino)-2-(3,5-di-tert-butyl-4-hydroxyphenyl)- propionic acid by oxygen at 55-60°C it is formed 2,4-di-tert-butylbicyclo( 4,3,1)deca-4,6-dien-8-(N-acetylamino)-3,9-dion-1-oxa, which constitution is based on the data of spectrums of NMR ¹H ¹³C.
Chapter
New of condensation with simultaneous elimination tertiary butyl groups it is found in reaction of basic hydrolysis of diethyl N-acetylamino- (3,5-di-tert-butyl-4-hydroxybenzyl)-malonate in which result it is formed 2-(3,'5'-di-tert-butyl-4'-hydroxy-phenyl)ethyloxy-p-cresol. The compound constitution is based on the data NMR ¹H and ¹³C, IR-spectra...
Article
A macrokinetic model of pyrolysis of carbonaceous feedstock in a tubular reactor was proposed. It was shown that, under unsteady-state conditions (at oscillating temperature of feedstock heating), higher conversions can be reached in comparison with steady-state conditions, which agrees with experimental data on flash pyrolysis of biomass in a tubu...
Article
With the use of scanning electron microscopy, differential scanning calorimetry, and electron paramagnetic resonance, the structural–dynamic analysis of ultrathin fibrous matrixes based on poly(3-hydroxybutyrate) and blend composites of this polymer with chitosan is performed. It is shown that the addition of a small amount of chitosan causes chang...
Article
A kinetic model of flash pyrolysis as a branched-chain process was presented. It was shown that, under unsteady temperature conditions, the branched-chain process significantly enhances carbonaceous feedstock processing.
Article
Full-text available
Structural-dynamic analysis based on combined thermophysical and molecular mobility measurements via spin-probe ESR spectroscopy has been applied to films and fibrous matrixes based on poly(3-hydroxybutyrate). The dynamic behaviors of partially crystalline samples during deformation under conditions of electrospinning and cold rolling have been com...
Article
Full-text available
Results of oxidation 2-(N-acetylamine)-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid oxygen depend on temperature. At 55℃ - 60℃, 2,4-di-tert-butylbicyclo(4,3,1)deca-4,6-dien-8-(N-acetylamine)-3,9-dion-1-oxa is formed. The constitution is based on dates of spectrums 1Н and 13С NMR. At 95℃ - 97℃, mixtures of 2,4-di-tert-butylbicyclo(4,3,1)deca...
Article
Full-text available
On an example of spontaneous changes 5,7-di-tert-butylspiro (2,5) octa-4,7-diene-6-one at room temperature, a new example of condensations in a solid station is opened. The single crystal of 2-(3’, 5'-di-tert-butyl-4'-hydroxy-phenyl)-ethyloxy-p-cresole is produced as result of a structure transformation 5,7-di-tert-butylspiro (2,5) octa-4,7-diene-6...
Chapter
In this chapter we focused on the development of environmentally friendly intumescent/char forming coatings for wood and polymeric materials. For this purpose we have developed the method of oxidation of raw materials-–polysaccharides, seeds, and lignin by oxygen in the presence of catalyst. The main products of oxidation of such substrates are the...
Article
Data are presented for thermal and thermal-oxidation destruction of polypropylene nanocomposites based on organically modified layered aluminosilicate, nanodispersed calcium carbonate, and carbon nanotubes. The effect is revealed of structural characteristics of nanodispersed additives on the change in thermal stability of polypropylene nanocomposi...
Chapter
The results of the transesterification methyl ester 3-(3', 5'-di-tert.butyl-4'- hydroxyphenyl)-propionic acid, are known and generalised by polyols in reviews [1]. However, the information bound to pentaerythrityl-tetrakis-(3-(3', 5'-di-tert.butyl-4'-hydroxyphenyl)-propionate) is discordant and mainly based on declaring of the patent data [2-7]. Th...
Chapter
N.M. Emanuel Institute of Biochemical Physics (Russian Academy of Sciences) has several perfect installation of electron spin resonance (ESR). ESR-method is very effective and very sensitive for investigation of radical reaction in chemistry and biochemistry. This method was created in 1944 [1] by Prof. K.M. Zavoiskii (Academy of Sciences of USSR)....
Chapter
Antioxidants are a component of the majority of known polymerous stuffs and consumer properties of products depend on their efficacy. Antioxidants of phenolic structure are additives to polymers because of high performance to protect polymers from thermal-oxidative degradation processes. From this class of stabilizers the most widespread are deriva...
Article
Polypropylene (PP)/exfoliated graphite nanoplatelet (xGnP) nanocomposites with various intrinsic aspect ratios of graphite nanoplatelets (GnPs; large and small in diameter) were prepared by a melt-mixing procedure. Transmission electron microscopy showed that all types of xGnP were well-dispersed in the polymer matrix. The effects of the dimensions...
Article
Full-text available
Differential scanning calorimetry (DSC), EPR probe analysis, large-angle X-ray diffraction (XRD), and UV spectroscopy are used to study the molecular dynamics and structure of hydroxybutyrate (PHB) copolymer, chitosan, and mixed compositions thereof upon thermal treatment in an aquatic medium. It is shown that, in mixed compositions, starting from...
Article
Energies of formation, enthalpies, and entropies of the conformers of 1-(carboxy)-1-(N-methylamide)-2- (3',5'-di-tert-butyl)-4-hydroxyphenyl)-propionic acid and sodium and potassium 1-(carboxy)-1-(N-methylamide)-2-(3',5'-di-tert-butyl)-4-hydroxyphenyl)-propionates are calculated by quantum-chemical methods in the PM6 approximation. A doubling of si...
Article
Full-text available
A novel universal approach to cross-linking of protein macromolecules on the surface of magnetite nanoparticles has been developed. The approach is based on protein liability to free-radical modification, leading to the formation of intermolecular covalent cross-links. Free radicals are locally generated on the surface of nanoparticles. Stable coat...
Article
Sodium (1) and potassium (2) 1-(carboxy)-1-(N-methylamide)-2-(3′,5′-di-tert-butyl)-4-hydroxyphenyl)-propionates form crystal hydrates, which exist as both monomers and dimers. Quantum-chemical calculations in the PM6 approximation are used to determined the enthalpies of formation −H f po, thermal enthalpy H po, and entropy S po of the monomers an...
Article
Studies of thermal and fire-resistant properties of the polypropylene/multi-walled carbon nanotube composites (PP/MWCNT) prepared by means of melt intercalation are discussed. The sets of the data acquired with the aid of non-isothermal TG experiments have been treated by the model kinetic analysis. The thermal-oxidative degradation behavior of PP/...
Article
Full-text available
The specific features of novel blends on the basis of copolymers 3-hydroxybutyrate with hydroxyvalerate (95:5 mol %) (PHBV) and segmented polyetherurethane (SPEU) have been investigated. The samples with different content (100/0, 60/40, 40/60, 50/50, and 0/100 wt.%) are explored by structural (WAXS, FTIR), thermophysical (DSC) and dynamic (probe ES...
Article
Full-text available
Biodegradable compositions based on natural polymers in combination with synthetic polymers offer an alternative to individual polymers. Blending is expectable to endow the composition with some new physicochemical characteristics that are not intrinsic to its individual components. Innovation technologies employ biodegradable systems for the targe...
Article
The present study is focused on development of environmentally friendly intumescent/char forming coatings for wood and polymeric materials. For this purpose we have developed the method of oxidation of raw materials: polysaccharides, seeds and lignin by oxygen in the presence of catalyst. The main products of oxidation of such substrates are the sa...