Abstract
Surface analysis of hydrocarbon polymers (polyethylene (PE), polypropylene (PP), polystyrene (PS)) by He-ion bombardment was performed from the theoretical and experimental valence X-Ray photoelectron spectra (XPS). The polymers were He-ion bombarded at an energy of 150 keV with fluences between 1 × 1012 and 1 × 1015 ions cm-2. The bombardment destroys the chemical bonds of the polymer surface and activates carbon atoms near the surfaces. They may produce radicals and recombine with oxygen in the residual gas and/or atmospheric oxygen. We consider that experimental results for valence XPS of the polymers due to the bombardment are simulated by deMon density-functional theory (DFT) calculations using the model trimers, or dimer of neutral, radical, cationized, and oxidized compounds.
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Koizumi, S., Nakao, A., Endo, K. et al. Analysis of Valence XPS of Hydrocarbon Polymers Modified by He-Ion Bombardment. Polym J 33, 621–628 (2001). https://doi.org/10.1295/polymj.33.621
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DOI: https://doi.org/10.1295/polymj.33.621