Abstract
From analysing electron and vibration spectra and EPR spectra it was concluded that the main cause of absorption of oxidized polycarbonate (PC) in the visible range is the formation of polyconjugated systems (PCS). A direct proportionality is observed between absorption in the visible range and the number of paramagnetic centres in the polymer oxidized. A study of TR spectra of oxidized PC shows that as a result of oxidation double bonds, carbonyl groups, conjugated with the benzene ring are formed in the polymer and the background is extended in the 800–1600 cm −1 region. Variations of IR spectra in the range of deformation vibrations of C—H bonds of the methyl group suggest that the decomposition of the isopropylidene group of PC takes place with both methyl groups.
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