Georges Pavlov | Institute of macromecular compounds of russian academy of sciences (original) (raw)
Papers by Georges Pavlov
Polymers
The peculiarities of viscosity data treatment for two series of polymer systems exhibiting associ... more The peculiarities of viscosity data treatment for two series of polymer systems exhibiting associative properties: brush-like amphiphilic copolymers—charged alkylated N-methyl-N-vinylacetamide and N-methyl-N-vinylamine copolymer (MVAA-co-MVACnH2n+1) and charged chains of sodium polystyrene-4-sulfonate (PSSNa) in large-scale molecular masses (MM) and in extreme-scale of the ionic strength of solutions were considered in this study. The interest in amphiphilic macromolecular systems is explained by the fact that they are considered as micellar-forming structures in aqueous solutions, and these structures are able to carry hydrophobic biologically active compounds. In the case of appearing the hydrophobic interactions, attention was paid to discussing convenient ways to extract the correct value of intrinsic viscosity η from the combined analysis of Kraemer and Huggins plots, which were considered as twin plots. Systems and situations were demonstrated where intrachain hydrophobic inte...
Advances in Physicochemical Properties of Biopolymers (Part 1), 2017
Journal of Polymer Science Part A: Polymer Chemistry, Aug 5, 2010
Molecular Characterization of Polymers, 2021
The translational diffusion of an isophthalic-acid-based aromatic polyamide (PA) containing sulfa... more The translational diffusion of an isophthalic-acid-based aromatic polyamide (PA) containing sulfate groups was studied in water, 7% aqueous H 2 SO 4 , and concentrated sulfuric acid containing NaCl. In 96% H 2 SO 4 + 1 M NaCl, the intrinsic viscosity [η] and diffusion coefficient D are related to the molecular mass M of PA by the formulas [η] = M 2 (48 + 0.9M 1/2 ) -3 , D = 10 -6 M -1 (90 + 1.7M 1/2 ), which are valid for M values ranging from 3 x 10 3 to 35 x 10 3 . The parameters of PA conformation are evaluated. The features of the hydrodynamic behavior of PA in aqueous H 2 SO 4 solutions of various concentrations and in 96% sulfuric acid with the addition of various salts are discussed.
Russian Journal of Applied Chemistry, 1996
Doklady Physical Chemistry, 1998
Polymer Chemistry, 2017
In-depth characterization of pharmaceutically relevant polymers plays a pivotal role in many area... more In-depth characterization of pharmaceutically relevant polymers plays a pivotal role in many areas, including nanoscience, gene therapy, analytical and polymer chemistry etc.
Journal of Polymer Science Part A: Polymer Chemistry, 2016
Polymer Chemistry, 2011
ABSTRACT Three novel ionic monomers having highly delocalized anions and electrochemically stable... more ABSTRACT Three novel ionic monomers having highly delocalized anions and electrochemically stable mobile cations, namely, 1-butyl-1-methylpyrrolidinium 1-[3-(methacryloyloxy)propylsulfonyl]-1-(trifluoromethane-sulfonyl)imide, 1-butyl-1-methylpyrrolidinium 1,1-dicyano-1-[(3-(methacryloyloxy)propylsulfonyl)]methanide and 1-butyl-1-methylpyrrolidinium 1-cyano-1-[(3-(methacryloyloxy)propylsulfonyl)]imide were synthesized and characterized. The structure of these monomers was designed to be a mimic of the most highly conductive bis(trifluoromethylsulfonyl)imide, tricyanomethanide and dicyanamide anions. By radical polymerization procedure a series of new anionic “polymeric ionic liquids” (PILs) were prepared. The solubility of these linear PILs, thermal stability, glass transition temperatures, molar masses and ionic conductivities were estimated. An advantage of the novel PILs was demonstrated by the comparison of their ionic conductivity at 25oC (2.0×10-81.6×10-7 S cm-1) with the unmodified poly(1-ethyl-1-methylpyrrolidinium 3-(methacryloyloxy)propane-1-sulfonate) analog. The increase in ionic conductivity is as high as three orders of magnitude and was found to depend on the size of the attached anion. The new ionic monomers were subsequently copolymerized with poly(ethylene glycol) dimethacrylate and poly(ethylene glycol) methyl ether methacrylate. The investigation of the copolymers properties revealed further improvement of the conductivity in approximately two orders of magnitude and the achievement of s = 4.8-6.8×10(-6) S/cm) at 40oC.
Carbohydrate Polymers, 1999
Polymer Science, Series A, 2019
Colloid and Polymer Science, 2019
Polymer science. Series A, Chemistry, physics, 1995
Conformational properties of poly(amidobenzimidazole) hydrochloride in dimethylacetamide containi... more Conformational properties of poly(amidobenzimidazole) hydrochloride in dimethylacetamide containing lithium chloride were characterized. As compared with poly(amidobenzimidazole) in pure dimethylacetamide, poly(amidobenzimidazole) hydrochloride in the salt-containing solution was shown to possess lower equilibrium rigidity. This effect is likely to be associated with specific interaction between polymer and solvent. The data on velocity sedimentation of the nonfractioned samples and application of sedimentation parameter β s allowed calculations of molecular parameters of poly(amidobenzimidazole).
Polymer science, 1993
The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studie... more The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studied in water by the methods of molecular hydrodynamics. The relationships [η]= 2.03×10 -3 M 0.772 ; D 0 = 2.64×10 -4 M -0.560 ; S 0 = 3.55×10 -15 M 0.440 ; and k S = 0.34 S 0 2.0 were obtained. Hydrodynamic invariant A 0 = (3.25±0.3)×10 -10 erg/(K mol 1/3 ) and sedimentation parameter β S = (1.1±0.2)×10 7 l/mol 1/3 were also calculated
Polymer science, 1993
The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studie... more The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studied in water by the methods of molecular hydrodynamics. The relationships [η]= 2.03×10 -3 M 0.772 ; D 0 = 2.64×10 -4 M -0.560 ; S 0 = 3.55×10 -15 M 0.440 ; and k S = 0.34 S 0 2.0 were obtained. Hydrodynamic invariant A 0 = (3.25±0.3)×10 -10 erg/(K mol 1/3 ) and sedimentation parameter β S = (1.1±0.2)×10 7 l/mol 1/3 were also calculated
Polymers
The peculiarities of viscosity data treatment for two series of polymer systems exhibiting associ... more The peculiarities of viscosity data treatment for two series of polymer systems exhibiting associative properties: brush-like amphiphilic copolymers—charged alkylated N-methyl-N-vinylacetamide and N-methyl-N-vinylamine copolymer (MVAA-co-MVACnH2n+1) and charged chains of sodium polystyrene-4-sulfonate (PSSNa) in large-scale molecular masses (MM) and in extreme-scale of the ionic strength of solutions were considered in this study. The interest in amphiphilic macromolecular systems is explained by the fact that they are considered as micellar-forming structures in aqueous solutions, and these structures are able to carry hydrophobic biologically active compounds. In the case of appearing the hydrophobic interactions, attention was paid to discussing convenient ways to extract the correct value of intrinsic viscosity η from the combined analysis of Kraemer and Huggins plots, which were considered as twin plots. Systems and situations were demonstrated where intrachain hydrophobic inte...
Advances in Physicochemical Properties of Biopolymers (Part 1), 2017
Journal of Polymer Science Part A: Polymer Chemistry, Aug 5, 2010
Molecular Characterization of Polymers, 2021
The translational diffusion of an isophthalic-acid-based aromatic polyamide (PA) containing sulfa... more The translational diffusion of an isophthalic-acid-based aromatic polyamide (PA) containing sulfate groups was studied in water, 7% aqueous H 2 SO 4 , and concentrated sulfuric acid containing NaCl. In 96% H 2 SO 4 + 1 M NaCl, the intrinsic viscosity [η] and diffusion coefficient D are related to the molecular mass M of PA by the formulas [η] = M 2 (48 + 0.9M 1/2 ) -3 , D = 10 -6 M -1 (90 + 1.7M 1/2 ), which are valid for M values ranging from 3 x 10 3 to 35 x 10 3 . The parameters of PA conformation are evaluated. The features of the hydrodynamic behavior of PA in aqueous H 2 SO 4 solutions of various concentrations and in 96% sulfuric acid with the addition of various salts are discussed.
Russian Journal of Applied Chemistry, 1996
Doklady Physical Chemistry, 1998
Polymer Chemistry, 2017
In-depth characterization of pharmaceutically relevant polymers plays a pivotal role in many area... more In-depth characterization of pharmaceutically relevant polymers plays a pivotal role in many areas, including nanoscience, gene therapy, analytical and polymer chemistry etc.
Journal of Polymer Science Part A: Polymer Chemistry, 2016
Polymer Chemistry, 2011
ABSTRACT Three novel ionic monomers having highly delocalized anions and electrochemically stable... more ABSTRACT Three novel ionic monomers having highly delocalized anions and electrochemically stable mobile cations, namely, 1-butyl-1-methylpyrrolidinium 1-[3-(methacryloyloxy)propylsulfonyl]-1-(trifluoromethane-sulfonyl)imide, 1-butyl-1-methylpyrrolidinium 1,1-dicyano-1-[(3-(methacryloyloxy)propylsulfonyl)]methanide and 1-butyl-1-methylpyrrolidinium 1-cyano-1-[(3-(methacryloyloxy)propylsulfonyl)]imide were synthesized and characterized. The structure of these monomers was designed to be a mimic of the most highly conductive bis(trifluoromethylsulfonyl)imide, tricyanomethanide and dicyanamide anions. By radical polymerization procedure a series of new anionic “polymeric ionic liquids” (PILs) were prepared. The solubility of these linear PILs, thermal stability, glass transition temperatures, molar masses and ionic conductivities were estimated. An advantage of the novel PILs was demonstrated by the comparison of their ionic conductivity at 25oC (2.0×10-81.6×10-7 S cm-1) with the unmodified poly(1-ethyl-1-methylpyrrolidinium 3-(methacryloyloxy)propane-1-sulfonate) analog. The increase in ionic conductivity is as high as three orders of magnitude and was found to depend on the size of the attached anion. The new ionic monomers were subsequently copolymerized with poly(ethylene glycol) dimethacrylate and poly(ethylene glycol) methyl ether methacrylate. The investigation of the copolymers properties revealed further improvement of the conductivity in approximately two orders of magnitude and the achievement of s = 4.8-6.8×10(-6) S/cm) at 40oC.
Carbohydrate Polymers, 1999
Polymer Science, Series A, 2019
Colloid and Polymer Science, 2019
Polymer science. Series A, Chemistry, physics, 1995
Conformational properties of poly(amidobenzimidazole) hydrochloride in dimethylacetamide containi... more Conformational properties of poly(amidobenzimidazole) hydrochloride in dimethylacetamide containing lithium chloride were characterized. As compared with poly(amidobenzimidazole) in pure dimethylacetamide, poly(amidobenzimidazole) hydrochloride in the salt-containing solution was shown to possess lower equilibrium rigidity. This effect is likely to be associated with specific interaction between polymer and solvent. The data on velocity sedimentation of the nonfractioned samples and application of sedimentation parameter β s allowed calculations of molecular parameters of poly(amidobenzimidazole).
Polymer science, 1993
The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studie... more The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studied in water by the methods of molecular hydrodynamics. The relationships [η]= 2.03×10 -3 M 0.772 ; D 0 = 2.64×10 -4 M -0.560 ; S 0 = 3.55×10 -15 M 0.440 ; and k S = 0.34 S 0 2.0 were obtained. Hydrodynamic invariant A 0 = (3.25±0.3)×10 -10 erg/(K mol 1/3 ) and sedimentation parameter β S = (1.1±0.2)×10 7 l/mol 1/3 were also calculated
Polymer science, 1993
The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studie... more The fractions of poly(methacryloylglucosamine) with molecular masses 7≤ M×10 -4 ≤ 550 were studied in water by the methods of molecular hydrodynamics. The relationships [η]= 2.03×10 -3 M 0.772 ; D 0 = 2.64×10 -4 M -0.560 ; S 0 = 3.55×10 -15 M 0.440 ; and k S = 0.34 S 0 2.0 were obtained. Hydrodynamic invariant A 0 = (3.25±0.3)×10 -10 erg/(K mol 1/3 ) and sedimentation parameter β S = (1.1±0.2)×10 7 l/mol 1/3 were also calculated