Abstract
Interfacial tensions between aqueous solutions of sodium carboxylates and n-alkanes were determined for a large variety of carboxylate structures. Very low interfacial tensions (<0.001 dyn/cm) were observed with sodium 2-benzylalkanoates, sodium 2-butylalkanoates, and sodium 4-(1-pentylalkyl) benzoates. The interfacial tensions were extremely dependent on pH, and each carboxylate had its own optimal pH depending on its structure and equivalent weight.
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