Abstract
The chemical constitution of KMnO 4/H 2SO 4-oxidized (sulfated) polyethylene (PE) surfaces has been explored by means of ESCA utilizing chemical shifts, peak intensity data, and chemical tagging reactions. In addition, the adsorption of Ca 2+ ions on sulfated PE was quantified by radiotracer measurements. Comparisons have been made with KClO 3/H 2SO 4 and K 2Cr 2O 7/H 2SO 4 as oxidizing agents and through replacing polyethylene by polystyrene. According to the present study the main chemical groups on a [Display omitted] . In the oxidation grooves, dissociable −COOH groups are also present in appreciable amounts. By annealing, a smoother and more homogeneous sulfated surface is produced, the composition of which strongly depends upon the state of the ionic groups at the heat treatment.
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