The effects of high-energy radiation on the surface chemistry of polystyrene: A mechanistic study
Article first published online: 10 MAR 2003
Copyright © 1993 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 47, Issue 12, pages 2187–2194, 20 March 1993
How to Cite
Onyiriuka, E. C. (1993), The effects of high-energy radiation on the surface chemistry of polystyrene: A mechanistic study. J. Appl. Polym. Sci., 47: 2187–2194. doi: 10.1002/app.1993.070471213
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 7 MAY 1992
- Manuscript Received: 6 AUG 1991
Irradiation of polystyrene by 15 Mrad gamma or exposure to a 254 nm ultraviolet (UV) light source leads to surface oxidation of the polymer to depths greater than 10 nm as opposed to ∼ 3 nm depth offered by either plasma or corona-discharge treatment. Oxidation increases linearly with UV irradiation time. More carboxyl (OCO) acid functionality, which increases with depth, was detected for UV-treated polymer. With 3 Mrad gamma irradiation, only hydroxyl (CC) groups were detected by XPS as the surface-oxidized species. ADXPS, GPC, and static SIMS data suggest that chain scission is the dominant degradation mechanism for polystyrene exposed to high gamma and UV radiation, respectively. © 1993 John Wiley & Sons, Inc.