PERCOLATION PHENOMENON ON FLUORINATED WATER-IN-OIL MICROEMULSIONS - THE EFFECT OF TEMPERATURE

The static dielectric constant and the conductivity versus temperature were studied on a water in oil microemulsion composed of perfluoropol yether (PFPE) oil and surfactant at a constant water to surfactant rat io for different oil to surfactant ratios. The evidence of a percolati on phenomenon is shown. An analysis in terms of scaling laws and a cal culation of the scaling exponents indicate a dynamic percolation proce ss below the threshold for all of the samples studied and above the th reshold, far from phase transition regions. The exponents of static pe rcolation are found above the threshold, close to the phase transition .