N. Borochov et H. Eisenberg, STIFF (DNA) AND FLEXIBLE (NAPSS) POLYELECTROLYTE CHAIN EXPANSION AT VERY-LOW SALT CONCENTRATION, Macromolecules, 27(6), 1994, pp. 1440-1445
The expansion of sodium poly(styrenesulfonate) (NaPSS) polyelectrolyte
coils has been studied by light scattering and velocity sedimentation
at a NaCl concentration of 0.5-0.001 M. Good agreement between the fl
exible NaPSS and intrinsically stiff DNA (data from a previous study)
is obtained in terms of the conformation-space renormalization-group a
pproach. Present polyelectrolyte the expansion and excluded-volume the
ories are not adequate to satisfactorily interpret the experimental re
sults.