A comparison of plasma-oxidized and photo-oxidized polystyrene surfaces

High-resolution core-level and valence-band X-ray photoelectron spectroscopic measurements show that polystyrene surfaces become more heavily oxidized during ultraviolet photo-oxidation than under plasma oxidation. A greater proportion of- C O 2-linkages are evident following the former treatment, a...

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Bibliographic Details
Published in:Polymer (Guilford) 1993, Vol.34 (17), p.3611-3613
Main Authors: Wells, R.K, Badyal, J.P.S, Drummond, I.W, Robinson, K.S, Street, F.J
Format: Article
Language:English
Subjects:
Applied sciences
Coating, metallization, dyeing
Exact sciences and technology
Machinery and processing
plasma oxidation
Plastics
Polymer industry, paints, wood
polystyrene
surfaces
Technology of polymers
ultraviolet oxidation
valence band
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Summary:High-resolution core-level and valence-band X-ray photoelectron spectroscopic measurements show that polystyrene surfaces become more heavily oxidized during ultraviolet photo-oxidation than under plasma oxidation. A greater proportion of- C O 2-linkages are evident following the former treatment, along with the virtual absence of any phenyl features in the valence region and an attenuated π-π∗ shake-up satellite in the C(1s) spectra. This apparent paradox of the more reactive medium producing a less oxidized surface is explained in terms of the complex plasma-surface interactions associated with the exposure of a polymer surface to an oxygen glow discharge.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(93)90044-B