https://doi.org/10.1140/epjp/s13360-023-04383-6
Regular Article
Photoelectrorheological properties of polyimides with sulfo-acid and sodium salt sulfo-acid groups: a comparative study
1
Institute of Applied Mechanics of Russian Academy of Science, Leningradsky Prt. 7, 125040, Moscow, Russia
2
A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova Str. 28, 119334, Moscow, Russia
Received:
13
June
2023
Accepted:
14
August
2023
Published online:
24
August
2023
The paper describes a new device that allows us to study the effect of ultraviolet irradiation on the electrorheological characteristics of new photosensitive materials based on colloidal polyimide systems containing SO3H (PI-I) and SO3Na (PI-II) groups. The samples were analyzed using rotational viscometry methods, and a significant effect of irradiation of the systems on the flow velocity and hence the viscosity of the medium and the electrorheological response was shown. At the same time, the dimensional and microrheological properties of colloidal polyimide systems in polar and nonpolar media under simultaneous ultraviolet irradiation and exposure to an electric field were monitored using IR spectroscopy and dynamic light scattering methods. The mobility and zeta potential of polyimide molecules were determined using a sensitive method of phase analysis of light scattering. It is shown that in almost all cases, irradiation of colloidal systems of polyimides led to the uncontrolled formation of larger particles, which decreased during the thermal reaction almost to the initial size, which indicates the stability of the studied systems to external influences (irradiation and electric current).
Alexander N. Danilin, Mariam G. Ezernitskaya and Nikolay A. Semenov have contributed equally to this work.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
