Abstract
In this paper, investigation has been performed on thermoplastic and aromatic polyurethane (PU) irradiated by an electron beam with an energy of 200 keV. The changes in chemical structure resulting from the irradiation were determined using FTIR spectroscopy. This study has allowed us to highlight the polymer degradation versus depth, fluence, electron flux and temperature by following the decrease in the NH band intensity. Results showed that degradation of the PU reached a maximum at a depth of about 200 μm, and that these effects are quantifiable up to 500 μm. Moreover, the results also showed that the fluence, electron flux and temperature increase led to an increase in the degradation of the polymer. The oxidation was equally studied versus the same parameters by following the increase in the OH band intensity. This study produced the opposite results except for the temperature. When the temperature increased, the polymer oxidation seemed to decrease.
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