Proton uptake by poly(2-vinylpyridine) coatings

Citation
N. Tantavichet et al., Proton uptake by poly(2-vinylpyridine) coatings, J APPL POLY, 81(6), 2001, pp. 1493-1497
Citations number
13
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
00218995 → ACNP
Volume
81
Issue
6
Year of publication
2001
Pages
1493 - 1497
Database
ISI
SICI code
0021-8995(20010808)81:6<1493:PUBPC>2.0.ZU;2-C
Abstract
A titration technique has been used to directly measure the proton uptake b y ion-exchange poly(2-vinylpyridine) coatings as a function of solution pH. Contrary to the common assumption that each nitrogen in the pyridine ring is attached to an H+ when the polymer film is fully protonated, the use of the titration technique has shown that the portion of the pyridine sites ac tually protonated does not exceed 25% anywhere in the pH range where the co ating is stable. The pK(a) value for the poly(2-vinylpyridine) coating has also been estimated to be 4.5 from the titration curve. (C) 2001 John Wiley & Sons, Inc.