ABSTRACT
For the C14DMAO solutions with C100H and the CPySal system at the minimum viscosity the extremely low power-law exponent of 1.3 for the viscosity and an exponent of -1 for the structural relaxation times are found. The explanation for this behavior could be that the cylindrical micelles for systems with such low exponents are very flexible. In such a situation the persistence length would be much shorter than the contour length between two neighboring entanglement points. Furthermore, the persistence length should be independent of the concentration. The diffusion of the rods can therefore be described by a constant diffusion coefficient D. In order for two arms to collide, they have to diffuse a distance x. In order for two neighboring rods to undergo a bond exchange process, they have to diffuse at least for the average distance x between two arms. The time constant r:D for the diffusion should be proportional to ~I D. Because the mesh size x decreases with the square root of the concentration, one obtains for the structural relaxation time r: the observed law r: "' 1 I De, which is identical to Eq. (9).
