Viscosity-change-induced density fingering in polyelectrolytes.
We have studied the density fingering of an acid-catalyzed autocatalytic reaction in the presence of carboxylate containing polyelectrolyte. The decrease in viscosity as a result of the change in the ionic character of the polymer due to the pH-change during the reaction is the major driving force for the spatiotemporal pattern formation. The front evolution is quantitatively characterized by dispersion curves.
Rica
Tamás
T
Department of Physical Chemistry, University of Szeged, Szeged, Hungary.
Horváth
Dezsö
D
Tóth
Agota
A