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Calorimetric analysis of liquid—liquid phase separation

Authors
Journal
Thermochimica Acta
0040-6031
Publisher
Elsevier
Publication Date
Volume
238
Identifiers
DOI: 10.1016/s0040-6031(94)85204-9

Abstract

Abstract It is shown that differential scanning calorimetry may be used to determine miscibility gaps in micromolecular as well as in macromolecular systems. The first deviation of the signal from the base line is indicative of the onset of liquid—liquid phase separation and allows determination of the cloud-point curve. The area of the endo- or exothermic signal is related to the heat of demixing and may be analysed to supply information about the enthalpic part of the pair-interaction parameter. The method is tested on the systems water/nicotine and n-butanol/poly(methyl methacrylate).

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