Abstract
Kinetically frozen polystyrene-block-poly(methacrylic acid) (PS-PMA) micelles were prepared by dialysis of reversible micelles from 1,4-dioxane-rich aqueous solutions in solvents with increasing content of water and finally in pure aqueous media. Dynamic light scattering (DLS) and capillary zone electrophoresis (CZE) were used to determine the hydrodynamic radius and electrophoretic mobility of micelles as functions of pH. The electrophoretic curves show broad and relatively fast moving micellar peaks, indicating fairly high electrophoretic mobility and a non-negligible net electric charge of micelles. The experiments show that CZE is a suitable technique for studying polyelectrolyte micelles.
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