We apply dynamic scaling to both unentangled and entangled semidilute polyelectrolyte solutions. The unentangled semidilute regime can span three to four decades of polymer concentration in low-salt solutions. In this range we predict such phenomena as a concentration independent self-diffusion coefficient, relaxation time that is a decreasing function of concentration $c$, and explain the empirical Fuoss law for the viscosity $\eta \sim c^{\frac{1}{2}}$. In the low-salt entangled regime we predict the concentration independent relaxation time and the viscosity $\eta \sim c^{\frac{3}{2}}$ that are observed experimentally.

• Received 29 April 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.2776