Abstract

The surface tensions of the α,ω-alkanediols which are liquids at room temperature, and their interfacial tensions against selected n-alkanes (from heptane to hexadecane), have been measured. The surface tensions of the equilibrated phases and several mutual solubilities have also been determined. The surface and interfacial tensions all exhibit a linear dependence on (molecular weight) − 1 2 . Similarities and differences between the present results and some earlier measurements on alkane/poly(ethylene glycol) systems are discussed; the importance of the ether oxygens of the poly(ethylene glycols) in influencing interfacial properties is made evident. Extrapolation of surface and interfacial tension data yields surprisingly accurate predictions of alkane/water interfacial tensions and the surface tension of water.

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