Correlations and dynamics of polyelectrolyte solutions

J. Hayter , G. Janninck , F. Brochard-Wyart , P.-G. de Gennes (1)

1 LPMC - Laboratoire de Physique de la Matière Condensée

The dynamics of polyelectrolyte solutions have been studied using a neutron spin echo spectrometer for wave vectors q around the maximum of the static structure factor (qm). The q dependent diffusion coefficient D(q) decreases sharply below q = qm, and is nearly constant above qm. All these features can be understood in terms of a new picture for the correlations, based on : i) the notion of a correlation hole, of diameter ξ = aØ-1/2 ; ii) locally rigid chains with a persistence length b = aØ-1 (where Ø is the polymer volume fraction and a the monomer size).

Mots clés: diffusion in liquids; electrolytes; macromolecular configurations; macromolecular dynamics; neutron diffraction examination of materials; polymers; polyelectrolyte solutions; neutron spin echo spectrometer; wave vectors; diffusion coefficient

Domaines: Articles anciens

J. Hayter, G. Janninck, F. Brochard-Wyart, P.-G. de Gennes. Correlations and dynamics of polyelectrolyte solutions. Journal de Physique Lettres, 1980, 41 (18), pp.451-454. ⟨10.1051/jphyslet:019800041018045100⟩. ⟨jpa-00231819⟩