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Water-in-oil (w/o) highly concentrated emulsions form in ternary water/nonionic surfactant/hydrocarbon whose rheological behavior has been investigated using oscillatory measurements. The effects of , volume fraction, oil-to-surfactant ratio, and brine salinity on the rheological properties have been . The shear moduli (Go) and relaxation times (So) have been determined using a Maxwell model for viscoelastic liquid. The shear moduli are a function of y (interfacial tension), (volume fraction), and R32 (Sauter mean droplet radius). The relaxation times are proportional to (continuous-phase viscosity) and proportional to Go and l (continuous-phase volume fraction). The elastic component is related the structure of the emulsions and the viscous element to the continuous-phase viscosity.
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Pons et al. (1993) studied this question.
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