Volume 39, Number 3, July I 1997
|Page(s)||245 - 250|
|Published online||01 September 2002|
Oscillations in the dynamics of temperature-driven phase separation
Institut für physichalische Chemie, Universität Mainz,
55099 Mainz, Germany
2 Fachbereich Physik, Universität GH Essen, 45117 Essen, Germany
3 Institut für physichalische Chemie, Universität zu Köln, Luxemburger Str. 116, 50939 Köln, Germany
Accepted: 19 June 1997
We examine the dynamics of the phase separation of a single phase of water-in-oil microemulsion droplets towards a phase of smaller droplets coexisting with a water-rich phase. Oscillations are observed in the turbidity of the mixture and in the specific heat, when this transition is induced by a continuous temperature increase. The oscillations indicate an unusual type of dynamics which involves an energy barrier only to be overcome by a large number of droplets collectively. It is due to the spontaneous curvature of the water-oil-interface, and conservation of volumes.
PACS: 05.70.Fh – Phase transitions: general aspects / 64.70.Ja – Liquid-liquid transitions / 82.70.-y – Disperse systems
© EDP Sciences, 1997
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