Поиск :
Личный кабинет :
Электронный каталог: Akimov, A. V. - Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride)
Akimov, A. V. - Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride)
Статья
Автор: Akimov, A. V.
Journal of Fluorine Chemistry: Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride)
б.г.
ISBN отсутствует
Автор: Akimov, A. V.
Journal of Fluorine Chemistry: Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride)
б.г.
ISBN отсутствует
На полку
Статья
Akimov, A.V.
Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride) / A.V.Akimov, U.V.Pinaeva, G.A.Khromov, A.A.Tyutyunov, A.N.Nechaev, P.Yu.Apel, [a.o.]. – Text : electronic // Journal of Fluorine Chemistry. – 2026. – Vol. 289. – P. 110526. – URL: https://doi.org/10.1016/j.jfluchem.2025.110526. – Bibliogr.: 94.
Stabilized radicals formed by irradiation of thin poly(vinylidene fluoride) films with high-energy accelerated &sup(22)Ne&sup(+4), &sup(132)Xe&sup(+26) and &sup(209)Bi&sup(+51) ions with respective energies of 24, 158 and 670 MeV were studied by EPR, Fourier transform infrared, and UV-visible spectroscopies. The bombarding ions cause significant excitation and ionization along the ion tracks throughout the thickness of the film. The reduction of crystallinity and the formation of unsaturated bonds in the irradiated polymer were explored spectroscopically The presence of alkyl, peroxide, and polyenyl radicals were identified in the spectra of the irradiated polymer; mechanisms for radical formation are proposed. Preliminary freezing of the irradiated films to dry ice temperature and subsequent study after storage at room temperature led to quantitative estimates of the loss of radicals during storage. Computational chemistry was used to predict the thermodynamics of the degradation processes and resulting peroxide radical reactions. Localized energy due to the ion bombardment enabled thermodynamically unfavorable reactions to proceed. The results of the study should be useful for optimization of processes for creating PVDF-based membranes for various applications.
Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
Спец.(статьи,препринты) = С 344.4б - Методы приготовления тонких пленок$
ОИЯИ = ОИЯИ (JINR)2026
Akimov, A.V.
Paramagnetic Centers in Ion Bombarded Poly(Vinylidene Fluoride) / A.V.Akimov, U.V.Pinaeva, G.A.Khromov, A.A.Tyutyunov, A.N.Nechaev, P.Yu.Apel, [a.o.]. – Text : electronic // Journal of Fluorine Chemistry. – 2026. – Vol. 289. – P. 110526. – URL: https://doi.org/10.1016/j.jfluchem.2025.110526. – Bibliogr.: 94.
Stabilized radicals formed by irradiation of thin poly(vinylidene fluoride) films with high-energy accelerated &sup(22)Ne&sup(+4), &sup(132)Xe&sup(+26) and &sup(209)Bi&sup(+51) ions with respective energies of 24, 158 and 670 MeV were studied by EPR, Fourier transform infrared, and UV-visible spectroscopies. The bombarding ions cause significant excitation and ionization along the ion tracks throughout the thickness of the film. The reduction of crystallinity and the formation of unsaturated bonds in the irradiated polymer were explored spectroscopically The presence of alkyl, peroxide, and polyenyl radicals were identified in the spectra of the irradiated polymer; mechanisms for radical formation are proposed. Preliminary freezing of the irradiated films to dry ice temperature and subsequent study after storage at room temperature led to quantitative estimates of the loss of radicals during storage. Computational chemistry was used to predict the thermodynamics of the degradation processes and resulting peroxide radical reactions. Localized energy due to the ion bombardment enabled thermodynamically unfavorable reactions to proceed. The results of the study should be useful for optimization of processes for creating PVDF-based membranes for various applications.
Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
Спец.(статьи,препринты) = С 344.4б - Методы приготовления тонких пленок$
ОИЯИ = ОИЯИ (JINR)2026
