ISSN:
1435-1536
Keywords:
Microemulsions
;
dielectric properties
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The high-frequency dielectric relaxations of highly concentrated water-in-oil microemulsions have been investigated in the frequency range from 1 MHz to 1 GHz, at different temperatures, in the interval from 5 °C to 60 °C. In the region of the phase diagram studied, the system undergoes a progressive change of its structure, passing from water droplets dispersed in an oil matrix below percolation to two bicontinuous regions separated by a lamellar phase, above percolation. We have focused our attention on these two bicontinuous regions, where well-pronounced dielectric dispersions appear. An analysis in terms of scaling laws indicates a static percolation process above the percolation threshold and close to it and a process characterized by a very small value of the critical index, at higher temperatures, close to the phase transition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01188968
