Abstract
An experimental and analytical study of the photooxidation of poly(butyleneterephthalate), carried out under monochromatic wavelength (254, 365 nm) and under polychromatic wavelength ( λ ≥ 300 nm) is reported. Oxidation products formed by irradiation of films were investigated by FTIR spectroscopy; a series of chemical derivatization reactions were developed in order to identify the photoproducts. Most of them were observed to be analogous to vacuum photolysis species. It has been shown that the repartition of photoproducts in the polymer was heterogeneous. The results of photoproduct identification accounted for the mechanism of photooxidation proposed that implied both pure photolytical processes and photo-induced oxidation route.
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