Phase transitions in liquid-crystalline cyanoethyl cellulose solutions in magnetic field

Вшивков, С. А.; Rusinova, E. V.; Kutsenko, L. I.; Galyas, A. G.

doi:10.1134/s156009040707007x

Cited by 11 publications

(6 citation statements)

References 1 publication

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“…This orientation is associated with the molecular anisotropy of macromolecules rather than with the existence of permanent magnetic moments. Owing to additional orientation of such macromolecules induced by a magnetic field, the temperature-concentration region of existence of liquid crystalline phases extends and additional self-assembly of macromolecules appears [11,39,[47][48][49][50]. However, little is known about the effect of a magnetic field on the viscosity of polymer solutions [51,52].…”

Section: Introductionmentioning

confidence: 99%

Phase diagrams and rheological properties of cellulose ether solutions in magnetic field

Вшивков¹,

Rusinova²,

Galyas³

2014

European Polymer Journal

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Section: Introductionmentioning

confidence: 99%

Phase diagrams and rheological properties of cellulose ether solutions in magnetic field

Вшивков¹,

Rusinova²,

Galyas³

2014

European Polymer Journal

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“…Since 2006, researchers of the Chair of Macromolecular Compounds, Ural State University investigate the effect of magnetic field on the phase transitions, structure and rheological properties of liquid crystalline solutions of cellulose ethers [12,13,[29][30][31][32][33][34][35][36].…”

Section: Effect Of Magnetic Field On Liquid Crystalline Systemsmentioning

confidence: 99%

“…Thus, it should be followed by separation in two phases, one of which exhibits ordered macromolecules and the other that ensures that molecules are randomly oriented relative to each other. As the concentration of polymer continues to increase, the share of the ordered phase grows, and eventually the system becomes one-phased again while all macromolecules are relatively ordered [1,14,[29][30][31][32][33][34][35][36][37].…”

Section: Phase Diagrams Of Solutions Of Rigid-chain Polymersmentioning

confidence: 99%

Phase Transitions and Structure of Liquid Crystalline Cellulose Ether Solutions in a Magnetic Field and in Its Absence

Вшивков¹,

Rusinova²

2022

Liquid Crystals

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The results of research studies of a magnetic field effect on structure and phase transitions of liquid crystalline polymer systems are described. Influence of intensity of the magnetic field, molecular weight, and concentration of polymers in solutions on the phase diagrams is analyzed. The dependences of boundary curves on the chemical structure of polymers and solvents are discussed. Results of theoretical researches of the magnetic field effect on the diamagnetic macromolecule orientation in solutions are described. The shift of boundary curves of liquid crystalline cellulose derivative systems is compared with the energy of magnetic field stored by solutions.

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“…Since 2006, researchers of the Chair of Macromolecular Compounds, Ural State University (since 2011 Ural Federal University), have been involved in systematic investigations of the effect of magnetic field on the phase transitions, structure, and rheological properties of liquid crystalline solutions of cellulose ethers. It was found [57][58][59][60][61][62][63][64] that application of a magnetic field leads to a change in the type of liquid crystals from cholesteric to nematic, causes formation of domains in solutions, and entails a substantial (by tens of degrees) increase in the temperature of formation of liquid crystalline phases. As the molecular mass of a polymer is increased, the ability of its molecules to orientate in the magnetic field is reduced.…”

Section: Introductionmentioning

confidence: 99%

Polymer Rheology

2018

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The results of researches of a magnetic field effect on rheological properties of both paramagnetic, and diamagnetic polymer systems are described. Influence of intensity and the direction of power lines of the magnetic field on the viscosity of magnetic liquids and magnetorheological suspensions is analyzed. Results of theoretical researches of the magnetic field effect on the diamagnetic macromolecule orientation in solutions are discussed. The data on the influence of the magnetic field on rheological parameters of cellulose ether solutions are generalized and analyzed. The rheological parameters are compared with a change of studied system structure under magnetic field. The concentration dependences of viscosity and the sizes of supramolecular particles in solutions are compared. The rheological behavior of systems in a region of phase transitions is considered. Concentration dependences of the viscosity are described by curves with a maximum which concentration corresponds to a phase transition concentration.

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Phase transitions in liquid-crystalline cyanoethyl cellulose solutions in magnetic field

Cited by 11 publications

References 1 publication

Phase diagrams and rheological properties of cellulose ether solutions in magnetic field

Phase diagrams and rheological properties of cellulose ether solutions in magnetic field

Phase Transitions and Structure of Liquid Crystalline Cellulose Ether Solutions in a Magnetic Field and in Its Absence

Polymer Rheology

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