Surface Modification of Polystyrene by Gamma-Radiation
- 1 June 1990
- journal article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 44 (5) , 808-811
- https://doi.org/10.1366/0003702904086975
Abstract
The effect of gamma-radiation on the surface chemical properties of polystyrene was studied by ESCA and FT-IR. Gamma-radiation produces surface >C=O and C-O containing functional groups only, and also causes oxidation to depths >10 nm as detected by ESCA. FT-IR spectra showed that below the top few molecular layers ester, acid, and carbonyl groups of various types were present. The α,β-unsaturated carbonyl/acid groups form a higher proportion of the total carbonyls with increasing depth. Surface oxidation follows pseudo-first-order kinetics; the extent of interior oxidation is linear with dose.Keywords
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