Volume 52, Number 3, November I 2000
|Page(s)||284 - 290|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Static properties of hydrophobic polyelectrolytes in the thermodynamic limit
Laboratoire de Physique de la Matière Condensée
URA 792, Collège de France
11 place Marcelin-Berthelot 75231 Paris, France
2 Departamento de Física, Centro de Investigación y de Estudios Avanzados del IPN A.P. 14-740, 07000 México D.F., Mexico
Accepted: 14 September 2000
A series of hydrophobic sodium poly(styrene-co-styrene sulfonate) of different charge fractions has been studied by static light scattering in the thermodynamic limit. In the examined concentration range (, in monomers), the solutions show an ideal gas behaviour. A quantitative comparison with previous osmotic pressure measurements reveals the existence of a strong variation of the polarizability, which is related to a change of local chain conformation. This result can be interpreted in terms of the globular instability model for hydrophobic polyelectrolytes (pearl necklace model).
PACS: 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 36.20.Ey – Conformation (statistics and dynamics) / 42.25.Fx – Diffraction and scattering
© EDP Sciences, 2000
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