A5015803209- Advanced Polymer Synthesis and Characterization
- Synthesis and properties of polymers
- Surfactants and Colloidal Systems
- Supramolecular Chemistry and Complexes
- biodegradable polymer synthesis and properties
- Nonlinear Optical Materials Research
- Dendrimers and Hyperbranched Polymers
- Photochemistry and Electron Transfer Studies
- Polymer Surface Interaction Studies
- Hydrogels: synthesis, properties, applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Analytical Chemistry and Chromatography
- Crystallography and molecular interactions
- Silicone and Siloxane Chemistry
- Supramolecular Self-Assembly in Materials
- Molecular Sensors and Ion Detection
- Lanthanide and Transition Metal Complexes
- Porphyrin and Phthalocyanine Chemistry
- Conducting polymers and applications
- Liquid Crystal Research Advancements
- Material Properties and Applications
- Photopolymerization techniques and applications
- Polymer Nanocomposites and Properties
Institute of Macromolecular Compounds
2015-2024
Petersburg Nuclear Physics Institute
2024
Kurchatov Institute
2024
St Petersburg University
1998-2016
Russian Academy of Sciences
2008-2015
State Optical Institute named after SI Vavilov
2003
Kazan State Technological University
2002
Johannes Gutenberg University Mainz
2000
Abstract Several series of thermotropic liquid‐crystalline polyesters, based on 4‐chlorocarbonyl phenyl esters aromatic dicarboxylic acids ( 1–4 ) and phenols or aliphatic diols, were synthesized studied by polarizing microscopy differential scanning calorimetry (DSC). A relationship between geometry mesogenic moiety stability mesophase formed the polymers was established. The effect both length chemical structure flexible fragments mesomorphic properties revealed for polyesters obtained...
Abstract The mechanism of the oxidative polymerization aniline is reviewed on basis experimental evidence and reaction schemes proposed in literature. It demonstrated that balance between non‐protonated protonated forms monomer growing chain responsible for diversity molecular structure, morphology properties oxidation products. Various are oxidized by two mechanisms: (1) electrophilic substitution (2) coupling cation‐radical centres. At pH > 2.5, reagents with a controlled aromatic ring....
Thermoresponsive star-shaped poly(2-isopropyl-2-oxazoline) with t-butylcalix[8]arene core was studied by light scattering methods in aqueous solution. The sample under investigation has Mw = 19600 g mol−1 and PDI of arms 1.41. bimodal distribution objects observed even at room temperature. redistribution these two kinds particles takes place T 27°–36°C. At higher temperatures the growth large particles, disappearance small component, appearance-disappearance “middle-size” aggregates were...
Four-arm star-shaped poly(2-isopropyl-2-oxazolines) (PiPrOx4) are synthesized by cationic polymerization on t-butylcalix[4]arene macroinitiator. The obtained samples differ degree of arms NPiPrOx = 9 and 25 characterized in chloroform. behavior aqueous solutions is studied light scattering methods compared with the results investigation eight-arm star similar structure. Three types particles observed solution short-arm PiPrOx4 at room temperature, whereas only two particle present long-arm...
Thermoresponsive graft copolymers with alkylene-aromatic polyester main chain and poly-2-ethyl-2-oxazoline side chains were synthesized. Two copolymer samples which differed in grafting density (0.5 0.7) studied using dynamic static light scattering turbidimetry aqueous solutions at concentration 0.0053 g cm−3. Hydrodynamic radii of objects their contribution to obtained as a function temperature wide interval. Temperatures phase separation found out. Effect on the behavior upon heating was...
Gellan gum (GG) has been used to prepare polymeric carriers with prolonged retention on the eye surface for topical ocular drug delivery. In this work, GG was chemically modified short poly(2‐ethyl‐2‐oxazoline) (PEtOx) chains that were expected have minimal adhesion mucosal tissues (mucoadhesion). The choice of synthetic procedure, solvents, and reagents dictated by biocompatibility materials possible application in grafts synthesized via cationic ring‐opening polymerization their living...
New thermoresponsive star-shaped poly(2-isopropyl-2-oxazoline) (PiPrOx) and poly(2-ethyl-2-oxazoline) (PEtOx) with arm grafting to upper rim of calix[8]arene core were synthesized studied in aqueous solutions by light scattering turbidimetry methods. The solution behavior was compared that for polyoxazoline stars varying positions grafting, i.e., lower calix[8]arene. observed growth the phase separation temperature PiPrOx as PEtOx is explained different dehydration temperatures ethyl-...
Star-shaped poly(2-isopropyl-2-oxazolines) with dramatically hydrophobic dendrimer core are synthesized using carbosilane dendrimers of first to third generations as macroinitiators. It is observed that half the initiator functional groups incorporated in polymerization process. The degree polyoxazoline arms about 25. Strong arm folding results small molecule dimensions both aqueous and organic solutions. Thermosensitive properties studied for second generation-based star solution...
Complex formation of various mono- and bis(hydroxyarylidene)alkanones with poly(1,10-decamethyleneacetamidine) in solution the solid phase was investigated by UV/vis NMR spectroscopy. It could be shown that due to strong basicity polyamidine a deprotonation chromophores occurred. This resulted significant shift longest wavelength absorption band higher wavelengths. Additionally, third-order nonlinear optical activity evidenced on cast films. Besides properties, thermal behavior mixtures also...
Properties of individual molecules star-like polystyrene with calix[8]arene core in dilute chloroform solutions were studied using methods static light scattering, translation diffusion, and viscometry. The solution behavior the polymer investigated significantly differs from properties linear polymers. Star-like macromolecules are characterized by compact structure—the hydrodynamic radius is not higher than 5.5 nm at M = 125,000 g⋅mol−1. shape slightly spherical.
Star-shaped six-arm poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline with hexaaza [26]orthoparacyclophane derivative core were synthesized successfully using cationic ring-opening polymerization. Conformational behavior of prepared polymer stars investigated by the methods molecular hydrodynamics optics in dispersed solutions. It was shown that conformation characteristics star-shaped polypeptoids depends on arm length, while chemical structure weakly affects studied polymers This is...