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Thermodynamics of Micellization of Surfactants of Low Aggregation Number: The Aggregation of Propranolol Hydrochloride

✍ Scribed by Vı́ctor Mosquera; Juan Manuel Ruso; David Attwood; Malcolm N. Jones; Gerardo Prieto; Félix Sarmiento

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
84 KB
Volume
210
Category
Article
ISSN
0021-9797

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✦ Synopsis

The self-association of propranolol hydrochloride in aqueous solution has been studied as a function of temperature. The critical concentration (C*) and the degree of ionization (␣) were determined by conductivity measurements at temperatures over the range 298.15 to 313.15 K. The enthalpy change on aggregation in water was measured by microcalorimetry. To calculate changes in the thermodynamic properties of aggregation the mass action model for high and low aggregation numbers was applied, the latter model giving better agreement between experimental and theoretical enthalpy changes.

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