DIELECTRIC-RELAXATION AND CONDUCTIVITY IN POLYELECTROLYTE-SURFACTANT COMPLEXES

The dielectric and conductivity behavior of some selected solid polyel ectrolyte-surfactant complexes (PE-surf) is characterized by broadband dielectric spectroscopy in the frequency range 10(-2)-10(7) Hz, Depen ding on phase-morphology and volume fraction of alkyl-tails, electrica l conductivities at room temperature of up to 10(-4) S/cm are found. I n addition, the behavior at low temperatures is characterized by two d istinct beta-relaxations which show an arrhenius-like activation, and their relaxation strength depends on temperature, in contrast to the s tandard behavior of dielectric media. The relaxations are assigned to surfactant movements, the number or strength of which increase with te mperature, which are obviously important already well below the glass transition temperature of the ionic layers. Doping of a selected compl ex showing a rather high basic conductivity with LiClO4 results in a d ecrease of the conductivity, which is explained by an increase in the glass transition temperature of the ionic layer.