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Details van artikel 112 van 189 gevonden artikelen
| Titel: |
PHASE EQUILIBRIA IN THE SYSTEM WATER-OCTYL SULFONATE-DIACID® (WESTVACO) MAGNESIUM SOAP |
| Auteur: |
Flaim, Tony Friberg, Stig E. |
| Verschenen in: |
Journal of dispersion science and technology |
| Paginering: | Jaargang 4 (1983) nr. 2 pagina's 175-190 |
| Jaar: |
1983 |
| Inhoud: |
Partial phase equilibria were determined for the magnesium soap of a dicarboxylic acid (5-(and6-)carboxy-4-hexyl-2-cyclohexene-l-yl octoanic acid) in combination with a C8 sulfonate surfactant and water. At high water contents the isotropic sodium octyl sulfonate micellar phase was stable to relatively high magnesium soap contents. However, above a certain magnesium soap/sodium sulfonate ratio, two isotropic liquids were in equilibrium. For systems containing no octyl sulfonate, one phase was a dilute aqueous solution of magnesium soap; the second phase was a concentrated liquid soap with water content near 45 weight percent. At high surfactant concentrations, the isotropic solution was in equilibrium with a hexagonal liquid crystalline phase. Changes in the liquid crystal lattice parameter, obtained by low-angle X-ray diffraction measurements at varied magnesium soap contents, indicated that the dicarboxylate soap assumed a folded conformation where both carboxylate groups were in contact with the aggregate-water interface. The folded conformation found for the magnesium soap suggested a relationship between the conformation of the dianion and the hydrotropic action of soaps of the dicarboxylic acid. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 112 van 189 gevonden artikelen
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