Ultrasonic Absorption and Density Studies of Counter-Ion Site Binding in Aqueous Solutions of Polyelectrolytes

摘要: The interest of ultrasonic absorption methods for the study problems specific to poly- electrolyte solutions is pointed out. It shown that conjunction and density measurements should provide quantitative informations (1) on distribution site bound counter-ions between those without with dehydration (2) exchange rates be­tween various types ions. On basis previous a model counter-ion binding presented. Ultrasonic relaxation spectra (absorption vs frequency curves) series polyphosphate are then given. They indicate two pro­cesses present. low process seems be essentially dependent while high associated polyion. In view these results presented kinetics binding. This rests primarily similarity by polyions ion-pair formation in simple electrolytic Manning’s theory condensation polyelec- trolyte solutions. assigns found polysalt perturbation waves equilibria states hydration complex formed ion part polyion involved From this derived equations relating times amplitudes rate constants counter-ions, volume changes concentrations different counter-ions. These can account quali­tatively all experimental results. However, their use determination parameters characterizing cobalt appears limited large number range investigat­ed work. To overcome first limitation extensive have been performed polyelectrolyte Such yield total change Wading which used analysis