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Thermal analysis of phase transitions in microemulsions |
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| Authors: | D Vollmer J Vollmer R Strey H -G Schmidt G Wolf |
| Institution: | 1. Institute for Physical Chemistry, University of Mainz, 55099, Mainz 2. Department of Physics, University of Essen, 45117, Essen 3. Institute for Physical Chemistry, University of Cologne, 50930, K?ln 4. Institute for Physical Chemistry, Technical University of Freiberg, 09596, Freiberg, Germany |
| Abstract: | Differential scanning microcalorimetric measurements on phase transitions in water-oil-surfactant mixtures are presented, demonstrating that this method is highly sensitive towards small heat changes connected with structural transitions in the samples. The values for the latent heat of phase transitions are determined and the results are compared with predictions from mean field theory, emphasizing the role calorimetric experiments can play to identify the most important contributions to the free energy describing the mixtures. Doing this, the present status of the understanding of temperature dependent phase transitions in microemulsions is reviewed. |
| Keywords: | bending free energy calorimetry latent heat microemulsions phase transitions |
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