Colloid and Polymer Science

, Volume 284, Issue 2, pp 183–191

The effect of acrylic acid amount on the colloidal properties of polystyrene latex

Authors

  • Duangporn Polpanich
    • Unité Mixte CNRS-bioMérieux, UMR-2714Ecole Normale Supérieure de Lyon
    • Department of Chemistry, Faculty of ScienceMahidol University
    • Department of Chemistry, Faculty of ScienceMahidol University
  • Abdelhamid Elaïssari
    • Unité Mixte CNRS-bioMérieux, UMR-2714Ecole Normale Supérieure de Lyon
Original contribution Colloid

DOI: 10.1007/s00396-005-1366-6

Cite this article as:
Polpanich, D., Tangboriboonrat, P. & Elaïssari, A. Colloid Polym Sci (2005) 284: 183. doi:10.1007/s00396-005-1366-6

Abstract

Poly(styrene-co-acrylic acid) (St/AA) latices were prepared by using a batch soap-free emulsion copolymerisation in non-buffered medium. Polymerisation kinetics, followed by gravimetric method, revealed that increasing AA comonomer concentration was directly proportional to the copolymerisation rate, while adding AA comonomer caused a strong decrease of particle size of final St/AA latex particle without affecting the size distribution. Transmission electron microscopy indicated that the particles were monodispersed and spherical in shape irrespective of AA amount used in the investigated range. The colloidal stability of the latices was increased upon increasing the AA concentration; owing to the electrosteric stabilisation originated from AA-rich layer on the particle surface. In addition, electrophoretic mobility of formed particles versus polymerisation conversion exhibited the constancy of the surface charge density during the polymerisation process and was inferred for discussion of the polymerisation mechanism of this system.

Key words

Carboxylated latexSurfactant-free emulsion polymerisationParticle size and morphologyColloidal stabilityElectrokinetic properties

Copyright information

© Springer-Verlag 2005