Abstract
Oxygenated functional groups are produced in polystyrene (PS) film upon exposure to 254 nm UV in air. At UV dosages much above 10 −4 E/cm 2, however, these functional groups accumulate in the film at a decreasing rate, as judged by infrared spectroscopy. Oxygen uptake experiments were performed to study PS photo-oxidation at high UV dosages. It was found that the buildup of functional groups in PS film stopped at UV dosages that caused autoinhibition according to the oxygen uptake method.
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