Abstract

Dielectric relaxation (102–109 Hz), transient- and phase (1–107 Hz) electric birefringences were carried out cojointly on a W/O ternary microemulsion system from water, benzene, and BHDC as surfactant, for different ratios w o : (water)/(BHDC) and volume fractions φ values. From the Kerr-effect approaches it is possible to distinguish the existence of dimers, trimers, and an unexpected sign-reversal of the Kerr constant as w o decreases, whatever the φ values. Preliminary analysis of the dielectric measurements evidences a freqeuncy power law of the conductivity below 103 Hz. The hypothesis of a quasi dc (i.e., dispersive) transport charge process is proposed and credits the possible presence of temporal self-similar clusters. Four marked dielectric relaxations have been found. The contributions of the Maxwell-Wagner interfacial polarization, the space charge manifestations via a surface resistivity and a double-layer polarization, as well as a possible molecular relaxation process are proposed.

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