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Summary: Photosulfonation of low‐density polyethylene (LDPE) films by UV irradiation in the presence of gaseous sulfur dioxide (SO2) and oxygen (O2) was studied by attenuated total reflectance (ATR) infrared spectroscopy and X‐ray photoelectron spectroscopy (XPS). The ATR and XPS analysis and chemical modification of UV‐irradiated LDPE films demonstrated the generation of CC double bonds and sultones in the reaction. These results indicated the possibility that sulfur trioxide (SO3) was produced during the photosulfonation. New pathways for the SO3 reaction with LDPE films, resulting in the formation of sulfonic acid groups, were proposed. Overview of the mechanism proposed for the photosulfonation of low‐density polyethylene by SO3 (produced upon UV‐irradiation of gaseous SO2 and O2). image Overview of the mechanism proposed for the photosulfonation of low‐density polyethylene by SO3 (produced upon UV‐irradiation of gaseous SO2 and O2).
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Kaneko et al. (2004) studied this question.
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