ABSTRACT
I. INTRODUCTION In numerous applications of surfactants the rheological behavior of their aqueous solutions is of great practical importance. Surfactant systems can have very complex flow properties. For example, concentrated solutions of certain surfactants are Newtonian liquids and their viscosities are only slightly higher than that of pure water. On the other hand, solutions of other surfactants have viscosities that are 106 to 107 times higher than the water viscosity although the surfactant concentration is still below 1 wt %, and such systems are also highly elastic. The viscosities of such samples can be varied within ~ 6 orders of magnitude by only a small change of different parameters like surfactant concentration, ionic strength, temperature, or concentration of additives [1].
