Abstract
Polyvinylidene fluoride (PVDF) samples have been irradiated with energetic heavy ions. Their structural and electronic modifications were studied by X-ray photoelectron spectroscopy (XPS) using a monochromatised X-ray source. A non-monochromatised X-ray source was used to irradiate the sample and to study the modifications induced by both X-rays and electrons. In addition a foil of polymer which was subjected to energetic heavy ions irradiation in the GANIL accelerator was also studied and compared with the samples irradiated with electron and X-ray. Changes in the shape, intensity and energy position of the C1s line enable us to suggest a two step mechanism for the polymer evolution after irradiation: i) creation of allenes produced by dehydrofluorination of the polymer backbone; ii) disappearance of the double bonds by addition of species (atoms or free readicals) generated under the beam.
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