ABSTRACT
Experiments demonstrate that interfacial tension varies with both interfacial composition and temperature. At equilibrium, both these quantities are uniform along an interface and hence so is interfacial tension. If transport processes (e.g., diffusion of surfactant to a newly created interface) cause interfacial tension to be time dependent while remaining uniform at each time, changes in interfacial shape may occur. Such processes may be followed by, for instance, monitoring the dimensions of a sessile or pendant drop as a function of time.
