ABSTRACT
I. INTRODUCTION A great number of surfactant-based products, such as shampoos, detergents, cosmetics, paints and coatings, and pharmaceutical products, contain one or more surfactants and other materials in one formulation. As a matter of fact, surfactant-based formulations in practical applications are almost always mix tures, consisting of surfactants, polymers, and other ingredients. These systems provide us with the opportunity to obtain unique properties and performance that are superior to those of the individual ones. These unique properties and the performance of the mixture system are associated with the interaction of surfactants and other ingredients. For instance, polymer in shampoos is used as a viscosity and moisturizing modifier; and in the formulation of detergents, polymer is an effective antireprecipitating agent as well as a viscosity modifier and chelating agent.
