Electron and proton irradiation of poly(vinylidene fluoride): characterization by electron paramagnetic resonance

Films of poly(vinylidene fluoride) (PVDF) were exposed to proton and electron beam irradiation at high doses, from 50 to 5000 kGy. Modifications induced in the samples were determined by electron paramagnetic resonance (EPR). Samples irradiated with electrons and protons showed similar behaviours, w...

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Bibliographic Details
Published in:Polymer degradation and stability 2003, Vol.81 (1), p.75-79
Main Authors: Adem, E., Burillo, G., Muñoz, E., Rickards, J., Cota, L., Avalos-Borja, M.
Format: Article
Language:English
Subjects:
Applied sciences
Crosslinking and degradation
Electrons
EPR
Exact sciences and technology
Physicochemistry of polymers
Polymers and radiations
Protons
PVDF
Radiation
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Summary:Films of poly(vinylidene fluoride) (PVDF) were exposed to proton and electron beam irradiation at high doses, from 50 to 5000 kGy. Modifications induced in the samples were determined by electron paramagnetic resonance (EPR). Samples irradiated with electrons and protons showed similar behaviours, with the presence of several types of radicals. The number of radicals produced as a function of dose in the proton case is slightly below that of the electron case, indicating non-linear effects. The evolution of radical density and its decay in the dark and in normal light conditions at room temperature was studied, as well as its decay with increase in temperature. When kept in the dark for up to 180 days, no decay of radicals was observed.
ISSN:0141-3910
1873-2321
DOI:10.1016/S0141-3910(03)00064-8