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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 3, p.240-248
https://doi.org/10.15407/ujpe62.03.0901    Paper

Khorolskyi O.V., Rudenko O.P., Zaymack O.M.

V.G. Korolenko National Pedagogical University of Poltava
(2, Ostrogradskyi Str., Poltava 36000, Ukraine; e-mail: khorolskiy.alexey@gmail.com)

Peculiarities of Changes in Time of Electrical Properties of Polyvinyl Alcohol in Dimethyl Sulfoxide Solutions

Section: Soft Matter
Original Author's Text:  Ukrainian

Abstract: Long-term changes of the dielectric constant of concentrated (5, 10, and 15 wt.%) solutions of low-molecular polyvinyl alcohol in dimethyl sulfoxide have been studied in a frequency interval of 0.5–200 kHz and at a temperature of 290 ± 1 K. A hypothesis is put forward that the time evolution of dielectric constant is governed by changes in the supramolecular structure of the polymer solution; those changes have a fluctuation nature and are associated with the establishing of equilibrium in the polymer solution. Using the law of corresponding states, a similarity between the kinetics of equilibrium establishment in the polyvinyl alcohol–dimethyl sulfoxide and glycerol–water solutions is demonstrated. With the help of a proposed mathematical model, the characteristic lifetimes and oscillation frequencies of microscopic inhomogeneities in the polyvinyl alcohol solution are determined.

Key words: permittivity, polyvinyl alcohol solutions, dimethyl sulfoxide, thermodynamic equilibrium.

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