Structure and dynamics of polyelectrolytes in salt-free solutions
- Univ. of Southern California, Los Angeles, CA (United States)
Static and dynamic light scattering have been used to investigate salt-free solutions of sodium poly(styrene sulfonate) over a broad range of concentration (0.01 to 45.6 g/L) and molecular weight (5000 to 1,200,000). Above 0.5g/L two diffusion coefficients are measured. The fast diffusion corresponds to coupled diffusion of polyions molecular weight. The angular dependence of the static scattering intensity and the residual dependence of the diffusion coefficient allow us to characterized the size of the scattering species responsible for the slow diffusion mode. Their dimensions are nearly independent of molecular weight. The authors suggest that these correspond to multichain domains. In the semidilute regime our results are not consistent with a model of a polyelectrolytes in an isotropic solution.
- OSTI ID:
- 141739
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Light-scattering study of the effect of salt and polyelectrolyte on magnetic latex particles