TITRATION BY CONTACT-ANGLE MEASUREMENT OF ACID-BASE SITES ON PLASMA-TREATED POLYOLEFIN SURFACES

Citation
Y. Depuydt et al., TITRATION BY CONTACT-ANGLE MEASUREMENT OF ACID-BASE SITES ON PLASMA-TREATED POLYOLEFIN SURFACES, Le Vide, (268), 1993, pp. 108-110
Citations number
NO
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
12660167
Issue
268
Year of publication
1993
Supplement
S
Pages
108 - 110
Database
ISI
SICI code
1266-0167(1993):268<108:TBCMOA>2.0.ZU;2-R
Abstract
Measurement of contact angles has been performed using aqueous solutio ns of different pH in order to study the contribution of Bronsted acid -base interactions to hydrophilicity. Besides paraffin (PF), air and N H3 plasma treated PF samples have been analyzed. While the contact ang les measured on the non treated polymer do not depend on the pH of the test fluids, they vary for the plasma treated PF samples. These varia tions are interpreted in terms of acid-base interactions with the func tional groups resulting from the plasma treatment. The surface of the PF treated in air appears essentially acid while the NH3 plasma leads to a surface where both basic and acid groups are found. XPS analyses provide a deeper insight into the chemical nature of these functional groups.