Analysis of polyethylene surface sulfonation
Article first published online: 10 MAR 2003
Copyright © 1994 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 52, Issue 4, pages 545–548, 25 April 1994
How to Cite
Fischer, D. and Eysel, H. H. (1994), Analysis of polyethylene surface sulfonation. J. Appl. Polym. Sci., 52: 545–548. doi: 10.1002/app.1994.070520410
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 24 OCT 1993
- Manuscript Received: 18 JUN 1993
Attachment of SO3H groups onto the surface of polymers by treatment with fuming sulfuric acid is a well-known procedure. In the present study we compare the number of SO3H groups per unit area measured by a number of methods including weight gain, thickness, FT-IR transmittance spectra, FT-IR surface spectra with ATR method, sodium exchange, and pH measurement of water in contact with the polymer surface. It can be shown that, under the chosen conditions, i.e., room temperature and 32% SO3 in H2SO4, oxidation of PE is the main reaction, while sulfonation accounts for less than 20% of the weight gained during reaction. Differences in the reactivity of high density and low density polyethylenes are discussed. Deprotonation in water compared with H+ /Na+ exchange indicates a poor penetration of sodium ions into deeper layers of the polymer. © 1994 John Wiley & Sons, Inc.