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The Effect of Poly(methyl vinyl ether-alt-maleic acid) Stabilizer on the Stability of Polyaniline–Poly(methyl vinyl ether-alt-maleic acid) Dispersions

Authors
Journal
Journal of Colloid and Interface Science
0021-9797
Publisher
Elsevier
Publication Date
Volume
227
Issue
2
Identifiers
DOI: 10.1006/jcis.2000.6898
Keywords
  • Stabilization
  • ζ Potential
  • Polyaniline Dispersion
  • Poly(Methyl Vinyl Ether-Alt-Maleic Acid)

Abstract

Abstract The polyaniline (PANI) dispersions have been prepared in acidic aqueous media by oxidative dispersion polymerization in the presence of a polymeric stabilizer. The polymeric stabilizer used in this study is the poly(methyl vinyl ether-alt-maleic acid) (PMVEMA) which contains acid groups (–COOH). The PANI–PMVEMA particles have a uniform size and a spherical shape. The PANI–PMVEMA dispersions show almost no desorption of the PMVEMA, even though the sonication at 500 W for 20 min and the centrifugation at 500 rpm for 60 min are performed 10 times. The existence of the PMVEMA on the surface is confirmed by X-ray photoelectron spectroscopy. The dispersion stability of the PANI–PMVEMA dispersions is extensively influenced by ζ potential which was governed by the acid group (–COOH) of the PMVEMA on the PANI–PMVEMA particle surface.

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