ДМ

Д. М. Каморин

Nizhny Novgorod State Pedagogical University

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ОА

О. А. Казанцев

Nizhny Novgorod State Pedagogical University

АP

А. P. Sivokhin

Nizhny Novgorod State Technical University

D. V. Orekhov

Nizhny Novgorod State Technical University

АС

А. С. Симагин

Nizhny Novgorod State Technical University

МВ

М. В. Савинова

Nizhny Novgorod State Pedagogical University

КВ

К. В. Ширшин

Nizhny Novgorod State Pedagogical University

ИР

И. Р. Арифуллин

Nizhny Novgorod State Pedagogical University

Maria Simonova

Institute of Macromolecular Compounds

S. I. Samodurova

Nizhny Novgorod State Pedagogical University

A. Yu. Sadikov

Nizhny Novgorod State Pedagogical University

Cooperative Institutions

Nizhny Novgorod State Pedagogical University

Nizhny Novgorod State Technical University

N. I. Lobachevsky State University of Nizhny Novgorod

Yaroslav-the-Wise Novgorod State University

Polymer Research Institute

Institute of Macromolecular Compounds

Russian Academy of Sciences

Privolzhsky Research Medical University

Saratov State University

Institute of Petroleum Chemistry

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Studies of concentration dependences of phase transition temperatures of amine-containing (meth)acrylic copolymers in aqueous solutions

Polymer Science Series D (2015)

Д. М. Каморин К. В. Ширшин О. А. Казанцев А. P. Sivokhin

Methacrylamide

Comonomer

Meth-

Acrylic acid

10.1134/s1995421215020094

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Citations (3)

Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains

Polymers (2021)

Maria Simonova Д. М. Каморин О. А. Казанцев Maria Nepomnyashaya А. П. Филиппов

Polymethacrylic molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains were investigated by static and dynamic light scattering and viscometry. The solvents used were acetonitrile, tetrahydrofuran, chloroform, and water. The grafted copolymers were molecularly dispersed and dissolved in tetrahydrofuran and acetonitrile. In these solvents, the molar masses of copolymers were determined. In thermodynamically good solvents, namely tetrahydrofuran and acetonitrile, investigated copolymers have a high intramolecular density and the shape of their molecules resembles a star-shaped macromolecule. In chloroform and water, the micelle-like aggregates were formed. Critical micelle concentrations decreased with the lengthening of the hydrophobic block. Molecular brushes demonstrated thermosensitive behavior in aqueous solutions. The phase separation temperatures reduced with an increase in the content of the oligo(propylene glycol) block.

Tetrahydrofuran

10.3390/polym13162715

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Citations (10)

Performance of Polyalkyl Acrylate Additives of Various Compositions in Low-Temperature Dewaxing of Oil Raffinates

Нефтехимия (2023)

И. Р. Арифуллин О. А. Казанцев Д. М. Каморин A. A. Moykin A. S. Medzhibovskiy

10.31857/s0028242123030139

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Citations (0)

The Influence of Synthesis Method on Characteristics of Buffer and Organic Solutions of Thermo- and pH-Responsive Poly(N-[3-(diethylamino)propyl]methacrylamide)s

Polymers (2022)

Maria Simonova Д. М. Каморин A. Yu. Sadikov А. П. Филиппов О. А. Казанцев

Thermo- and pH-responsive poly(N-[3-(diethylamino)propyl]methacrylamide)s were synthesized by free radical polymerization and RAFT polymerization. The molar masses of the samples were 33,000-35,000 g∙mol-1. Investigations of the dilute solutions showed that the prepared samples were flexible chain polymers. The behavior of the synthesized polymers in the buffer solutions was analyzed by turbidity and light scattering at a pH range of 7-13 and a concentration range of 0.0002-0.008 g·cm-3. When the concentrated solutions were at a low temperature, there were macromolecules and aggregates, which were formed due to the interaction of hydrophobic units. For the investigated samples, the lower critical solution temperatures were equal. The phase separation temperatures decreased as pH increased. The influence of polydispersity index on the characteristics of the samples in the solutions was analyzed. The radii of molecules of poly(N-[3-(diethylamino)propyl]methacrylamide) obtained by RAFT polymerization at this temperature at the onset and end of the phase separation interval were lower than ones for samples synthesized by conventional free radical polymerization.

Methacrylamide

Chain transfer

Dispersity

Molar mass

10.3390/polym14020282

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Citations (4)

FT-IR and computer modeling study of hydrogen bonding in N-alkyl acrylamide–toluene binary mixtures

Journal of Molecular Structure (2016)

Misha Rumyantsev О. А. Казанцев Sofia I. Kamorina Д. М. Каморин А. P. Sivokhin

Amide

10.1016/j.molstruc.2016.05.058

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Citations (7)

Dependence of efficiency of polyalkyl acrylate-based pour point depressants on composition of crude oil

Egyptian Journal of Petroleum (2021)

О. А. Казанцев И. Р. Арифуллин A. A. Moikin А. P. Sivokhin Alexander S. Medzhibovsky

Thirteen polyalkyl acrylate-based depressor additives with C16-C26 alkyl groups containing 0–30 mol% of various polar groups (amide, amine, ammonium, N-vinylpyrrolidone, oligo(ethylene glycol)) have been synthesized and tested in 18 crude oil samples of significantly different compositions. It has been shown that the dependences of the depressor effect on the additive concentration pass through maxima. An approach that predicts the degree of decrease in pour point of oil in the presence of polyalkyl acrylate additives depending on the content of paraffin and resin-asphaltene components was proposed for the first time. A polyalkyl acrylate with C16-20 alkyl groups proved to be the most versatile additive. However, polymers with different lengths of alkyl groups or containing polar groups are more effective for some oils.

Pour point

Amide

10.1016/j.ejpe.2021.06.002

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Citations (15)

Random and Diblock Thermoresponsive Oligo(ethylene glycol)-Based Copolymers Synthesized via Photo-Induced RAFT Polymerization

Polymers (2021)

А. P. Sivokhin D. V. Orekhov О. А. Казанцев Olga Sivokhina С. В. Орехов

Amphiphilic random and diblock thermoresponsive oligo(ethylene glycol)-based (co)polymers were synthesized via photoiniferter polymerization under visible light using trithiocarbonate as a chain transfer agent. The effect of solvent, light intensity and wavelength on the rate of the process was investigated. It was shown that blue and green LED light could initiate RAFT polymerization of macromonomers without an exogenous initiator at room temperature, giving bottlebrush polymers with low dispersity at sufficiently high conversions achieved in 1–2 h. The pseudo-living mechanism of polymerization and high chain-end fidelity were confirmed by successful chain extension. Thermoresponsive properties of the copolymers in aqueous solutions were studied via turbidimetry and laser light scattering. Random copolymers of methoxy- and alkoxy oligo(ethylene glycol) methacrylates of a specified length formed unimolecular micelles in water with a hydrophobic core consisting of a polymer backbone and alkyl groups and a hydrophilic oligo(ethylene glycol) shell. In contrast, the diblock copolymer formed huge multimolecular micelles.

Chain transfer

Raft

Dispersity

10.3390/polym14010137

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Citations (14)

The Influence of the Synthesis Conditions on the Compositional Inhomogeneity of Copolymers of Higher N-alkyl Acrylamides and n-docecyl (meth)Acrylate

International Polymer Science and Technology (2014)

А. P. Sivokhin S. I. Samodurova О. А. Казанцев К. В. Ширшин Д. М. Каморин

The “special” nature of the copolymerisation of higher N-alkyl acrylamides of different structure with n-dodecyl acrylate or n-docecyl methacrylate in butyl acetate or toluene is shown. It has been found that the compositional inhomogeneity of the obtained copolymers is determined by the overall initial monomer concentration and the structure of the ester, while the structure of the amides, replacement of the solvent, and variation of the initiator concentration have little effect on compositional inhomogeneity.

Butyl acrylate

10.1177/0307174x1404100108

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Citations (2)

Molecular brushes based on copolymers of alkoxy oligo(ethylene glycol) methacrylates and dodecyl(meth)acrylate: features of synthesis by conventional free radical polymerization

Polymer Bulletin (2020)

D. V. Orekhov Д. М. Каморин А. С. Симагин И. Р. Арифуллин О. А. Казанцев

Reactivity

10.1007/s00289-020-03390-2

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Citations (17)

Study of amphiphilic properties of amine- and oligo(ethylene glycol)-containing (meth)acrylic monomers

Designed Monomers & Polymers (2015)

О. А. Казанцев Д. М. Каморин D. V. Orekhov А. P. Sivokhin

The two-dimensional classification was applied to the estimation of hydrophilic–hydrophobic properties of four amine-containing (meth)acrylic monomers, 2-hydroxyethyl methacrylate, and four oligo(ethylene glycol) methacrylates of various degrees of the ethoxylation. For the monomers, the standard free energy of partition between water and organic phase and standard free energy of adsorption of monomers at the interface were determined in hexane/water systems. Based on the standard free energy of partition and standard free energy of adsorption amphiphilic properties of the monomers were evaluated in terms of the two-dimensional diagram. The monomers were divided into three groups with respect to the position of the monomers in the diagram. These positions are connected with the nature of the substances. The classification allows estimating of monomers partition between interfaces or bulk phases in systems with developed interfaces.

Acrylic acid

10.1080/15685551.2015.1012627

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Citations (13)