A5055288536- Liquid Crystal Research Advancements
- Polymer crystallization and properties
- Quantum Dots Synthesis And Properties
- Synthetic Organic Chemistry Methods
- Polymer Nanocomposites and Properties
- Advanced Polymer Synthesis and Characterization
- Synthesis and properties of polymers
- biodegradable polymer synthesis and properties
- Surfactants and Colloidal Systems
- Organometallic Complex Synthesis and Catalysis
- Photonic Crystals and Applications
- Membrane Separation and Gas Transport
- Molecular spectroscopy and chirality
- Shape Memory Alloy Transformations
- Advanced Cellulose Research Studies
- Nanomaterials for catalytic reactions
- Natural Fiber Reinforced Composites
- Material Properties and Applications
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- Analytical Chemistry and Chromatography
- Carbon dioxide utilization in catalysis
- Block Copolymer Self-Assembly
- Rheology and Fluid Dynamics Studies
- Silicone and Siloxane Chemistry
A.V. Topchiev Institute of Petrochemical Synthesis
2016-2025
Russian Academy of Sciences
2016-2025
Lomonosov Moscow State University
2008-2024
Institute of Solution Chemistry
2019
Moscow State Pedagogical University
2008
Control over nanoparticle shape, liquid crystal (LC) polymer architecture, and the related mesophase structure has made possible creation of new polymer/CdSe semiconductor composite materials. Surface modification quantum dot nanoparticles by hydrogen-bonded LC polymers resulted in formation uniform coagulation-free bulk systems. The effect on alignment within was established varying size dots. resultant composites represent a class nanomaterials which dots are aligned planes provided...
Low-temperature properties of high-density polyethylene (HDPE), low-density (LDPE), linear (LLDPE), and their blends were studied. The analyzed low-temperature mechanical involve the deformation resistance impact strength characteristics. HDPE is a bimodal ethylene/1-hexene copolymer; LDPE branched ethylene homopolymer containing short-chain branches different length; LLDPE binary ethylene/1-butene copolymer an ethylene/1-butene/1-hexene terpolymer. samples copolymers studied by gel...
Properties of the nematic–isotropic phase transition in polymer and low molecular weight liquid crystals doped with nanoparticles have been studied both experimentally theoretically terms mean-field theory. The variation temperature heat increasing volume fraction CdSe quantum dot copolymer nematics has investigated data are interpreted using results theory which accounts for a possibility separation when system undergoes transition. predicts that nematic isotropic phases different...
At a molecular level adhesive joint strength of pressure-sensitive adhesives (PSAs) is governed by the ratio between two generally conflicting factors: high energy cohesive interactions and large free volume. Increase in temperature leads to domination volume contribution over strength, affecting mechanisms debonding process, examined with probe tack test. Linear viscoelastic properties adhesion five types PSAs have been studied: polyisobutylene (PIB); acrylic, styrene-isoprene-styrene (SIS)...
Bulk and solution studies revealed a strongly pronounced effect of chain structure on the rheological relaxation behavior well-characterized vinyl acetate–vinyl alcohol copolymers similar composition polymerization degree. The frequency–temperature superposition principle is fully applicable to random copolymers, which demonstrate all expected states, whereas divergence reduced dynamic moduli–frequency dependences observed for multiblock copolymers. In latter case, terminal zone sensitive...
Copolymers of norbornene and cyclooctene were synthesized for the first time by cross-metathesis polynorbornene with polyoctenamer.
Abstract By means of in situ melt polycondensation polyethylenterephathalate accompanied with simultaneous reduction introduced graphene oxide, the composite filled reduced oxide was prepared. Melting and crystallization – polyethyleneterephthalate studied by differential scanning calorimetry method, rheological test carried out rotational rheometry compared to pristine polyethylenterephathalate. The morphology using optical microscopy. isolated from characterized thermogravimetry, X-ray...
The research investigates the thermal behavior of mixed systems based on natural and artificial cellulose fibers used as precursors for carbon nonwoven materials. Flax hemp were employed components; they first chemically treated to remove impurities enriched with alpha-cellulose. structure, chemical composition, mechanical properties both viscose studied. It was shown that fiber depend production process history; are characterized by a high content exhibit strength characteristics, whereas...
Abstract An efficient grafting‐onto way to polyoctenamer‐ graft ‐polyethylene glycol brushes is proposed, based on the combination of ring‐opening metathesis polymerization and polymer‐analogous reaction. New monomers cyclooct‐4‐en‐1‐ylmethyl methanesulfonate 4‐methylbenzenesulfonate are synthesized from cyclooctadiene then polymerized with high yields first generation Grubbs’ catalyst. Mesylate tosylate pendants in resulting polymers readily substituted oligoethylene monomethyl ethers...
We report on the structure, uniaxial orientation, and photoluminescent properties of CdS nanorods that form stable nanocomposites with smectic C hydrogen-bonded polymers from family poly(4-(n-acryloyloxyalkoxy)benzoic acids. TEM analysis microtomed films reveals small domains are homogeneously distributed in LC polymer matrix. They undergo long-range orientation formation one-dimensional aggregates rods when composite uniaxially deformed. The Stokes photoluminescence was observed NRs/LC...
Comparative studies of the structure and thermal behavior cellulose composite precursors with additives silyl-substituted acetylene alkoxysilanes were carried out. It is shown that introduction silicon-containing into matrix influenced fibers carbon yield after carbonization. Comparison activation energies decomposition reaction renders it possible to determine type additive its concentration, which reduces energy necessary for pyrolysis. C/O ratio in presence Si–C bond affected temperature...
An experimental phase diagram of the isotactic polypropylene-camphor system is constructed using an original optical method. It considerably deviates from dynamic diagram, which can be obtained conventional differential scanning calorimetry (DSC), and contains additional boundary line that describes camphor solubility in polymer. accurate makes it possible to perform a detailed consistent thermodynamic analysis DSC, optical, electron microscopy data on cooling prehomogenized mixtures...
Fluorinated polymers are attractive due to their special thermal, surface, gas separation, and other properties. In this study, new diblock, multiblock, random copolymers of cyclooctene with two fluorinated norbornenes, 5-perfluorobutyl-2-norbornene N-pentafluorophenyl-exo-endo-norbornene-5,6-dicarboximide, synthesized by ring-opening metathesis copolymerization macromolecular cross-metathesis in the presence first- third-generation Grubbs’ Ru-catalysts. Their bulk, solution characteristics...
The orientation behavior of liquid crystal networks having the Sm CA structure stabilized by H-bonds has been studied. mesogenic groups formed hydrogen bonds generate a layered polymer. are responsible for elastic properties polymer network and mechanism its plastic flow above threshold strain. mechanical response is interpreted in terms breaking reconnecting under stress. local sliding layers possible if temporarily disconnected then reconnected again to restore LC structure. anisotropy...
Abstract Differential scanning calorimetry (DSC) of triple blends high molecular weight poly( N ‐vinyl pyrrolidone) (PVP) with oligomeric poly(ethylene glycol) (PEG) 400 g/mol and copolymer methacrylic acid ethylacrylate (PMAA‐ co ‐EA) demonstrates partial miscibility polymer components, which is due to formation interpolymer hydrogen bonds (reversible crosslinking). Because both PVP PMAA‐ ‐EA are amorphous polymers PEG exhibits crystalline phase, the DSC examination informative on phase...