ABSTRACT
Diffusion of macromolecules in dilute solution is the most basic and most thoroughly studied field both theoretically and experimentally utilizing the dynamic light scattering technique. Nevertheless, there remains disagreement between theory and experiment. Gel electrophoresis is known as the standard technique for separation of DNA. The electro-rheology (ER) effect has been studied so far mainly on suspensions of polarizable particles and dielectric liquid as solvent. However, difference of density between particles and solvent leads to sedimentation of the particles and induces instability of the ER suspensions. Therefore, interest in the research area of the ER effect moved to homogeneous systems such as polymer solutions and liquid crystalline polymers. Electric birefringence is a powerful technique for investigation of the dynamical behavior of long threadlike micelles which are formed by mixing a surfactant and suitable salt and exhibit pronounced viscoelastic properties at low surfactant concentration CD.
