SPIN PROBE STUDY OF POLYMER CHAIN COLLAPSE IN PNIPAM-B-PEG COPOLYMERS

Авторы: SHATROV T.D., SIMENIDO G.A., IVANOVA E.A., CHERNIKOVA E.V., GOLUBEVA E.N.
Сборник: Atmosphere, ionosphere, safety. Edited O.P. Borchevkina, M.G. Golubkov.- Kaliningrad, 2025, ISBN 978-5-6042044-9-8
Глава в коллективной монографии
Год издания: 2025
Место издания: ООО "АЛГОМАТ" Калининград
Первая страница: 264
Последняя страница: 266
DOI: 10.59043/978-5-6042044-9-8_264
Аннотация: The influence of polymer molecular weight and presence of hydrophilic PEG block on PNIPAM chains collapse in aqueous solution was studied with spin probe EPR spectroscopy using TEMPO as a spin probe. It was shown that PNIPAM with lower LCST posessess broader temperature interval of collapse compared with high MW polymer. Change of polymer inhomogeneities dynamics was also observed: for low MW PNIPAM probe exchange between polymer inhomogeneities and bulk solution is possible.PNIPAM-b-PEG copolymer forms core-shell particles during collapse process. These particles lose aggregative stability and separate into new polymer phase at T > 60 °C.
Добавил в систему: Сименидо Георгий Александрович

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