Anomalies in Light Scattering from Polyelectrolyte in Semi-Dilute Solution Region

Light scattering by cooperative diffusion in semi-dilute polymer solutions

2014 We report measurements of relaxation times of the autocorrelation function for the Rayleigh line of light scattered by semi-dilute polymer solutions. LE JOURNAL DE PHYSIQUE LETTRES TOME 37, MARS 1976 Classification Physics Abstracts 7.146-7.221-7.610-5.660 Recent observations of polymer diffusive motions by light scattering have dealt with two extreme situations : the very dilute solution ...

Diffusion coefficient in a semi-dilute solution measured by concentration gradient technique and compared to quasielastic light scattering results

2014 We show experimentally that the translational diffusion coefficient of a semi-dilute solution does not depend on the time scale over which the measurement is made. As a consequence isothermal and adiabatic compressibilities are identical in semi-dilute solutions, and this diffusion coefficient can be viewed either as a cooperative diffusion coefficient in the pseudo-gel model, or as a diff...

Observation of scaling in semi-dilute theta solutions using dynamic light scattering

Light scattering from nonequilibrium concentration fluctuations in a polymer solution

Static scattering from polyelectrolyte solutions

2014 The static scattering intensity from a system composed of charged, coiled polyions, counterions and coions is investigated theoretically. The polyion configuration is described by a wormlike chain form factor having a persistence length and an excluded volume parameter obtained from Odijk’s theory. Counterion condensation is accounted for in both, the interactions between polymer segments ...