Polyelectrolyte persistence length in semidilute solution as a function of the ionic strength

The persistence length of a sodium sulfonated polystyrene (PSSNa) is measured by small-angle neutron scattering in the semidilute regime for 2 values of c, the polymer concentration, as a function of c s, the added salt concentration. The results suggest that this persistence length l p depends only...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1997-06, Vol.234, p.303-305
Main Authors: Spiteri, M.N., Boué, F., Lapp, A., Cotton, J.P.
Format: Article
Language:English
Subjects:
Ionic strength
Persistence length
Polyelectrolytes
Polymers
PSSNa
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The persistence length of a sodium sulfonated polystyrene (PSSNa) is measured by small-angle neutron scattering in the semidilute regime for 2 values of c, the polymer concentration, as a function of c s, the added salt concentration. The results suggest that this persistence length l p depends only on the ionic strength I = c + 2 c s, and questions the role of the counterion condensation at the nanometric scale. The variation l p ∼ I −1 3 found corresponds to the distance between free ions for concentrated solutions where the Debye-Hückel prediction for the screening length is no longer valid.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(96)00965-9