Abstract
Interfacial tension data obtained over the aqueous surfactant (sodium dodecyl sulfate) concentration range of (0 to 34.68 × 10-5) mol·L-1, the pH range of 4 to 9, and the temperature range of (20 to 50) °C are presented for the recommended chemical system of cumene and water. The measurements were made using an automatic DuNoüy tensiometer, and interfacial tension values ranged from (27.3 to 37.0) mN·m-1. The data show a nonlinear decrease with increasing surfactant concentration and pH; however, there is a linear decrease with increasing temperature. The interfacial pressure was also derived. The interfacial tension and interfacial pressure values were correlated by empirical equations.
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