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Article Dans Une Revue Journal of Thermal Analysis and Calorimetry Année : 1998

Thermodynamic Properties of CTAB in Aqueous Solutions of Neutral Polymers at 25°C

Résumé

Interactions of polyethylene glycols (PEGs) and polypropylene glycols (PPOs) in aqueous solutions of hexadecyltrimethylammonium bromide (CTAB) were investigated through thermodynamic properties at 25°C. The densities and heat capacities of the solutions were measured with a vibrating tube densimeter and a Picker flow microcalorimeter, respectively. The variations in the apparent molar volumes and heat capacities of both solutes, calculated from the densities and heat capacities of the solutions, are unusually large in the vicinity of the CMC, reflecting the existence of very strong interactions between CTAB and PPOs. With the more hydrophilic polymers, PEGs, the apparent properties of CTAB are less affected by the presence of the polymer, indicating that PEGs interact only weakly with CTAB.

Dates et versions

hal-00560969 , version 1 (31-01-2011)

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Citer

Karine Ballerat-Busserolles, Laurence Meunier, Geneviève Roux-Desgranges, Alain H. Roux. Thermodynamic Properties of CTAB in Aqueous Solutions of Neutral Polymers at 25°C. Journal of Thermal Analysis and Calorimetry, 1998, 54, pp.271-278. ⟨10.1023/A:1010162112407⟩. ⟨hal-00560969⟩
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