J. Phys. II France
Volume 3, Numéro 4, April 1993
Page(s) 573 - 594
DOI: 10.1051/jp2:1993152
J. Phys. II France 3 (1993) 573-594

Structure of polyacrylic acid and polymethacrylic acid solutions : a small angle neutron scattering study

A. Moussaid, F. Schosseler, J. P. Munch and S. J. Candau

Laboratoire d'Ultrasons et de Dynamique des Fluides Complexes URA 851, Université Louis Pasteur, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France

(Received 25 September 1992, accepted in final form 21 December 1992)

The intensity scattered from polyacrylic acid and polymethacrylic acid solutions has been measured by small angle neutron scattering experiemnts. The influence of polymer concentration, ionization degree, temperature and salt content has been investigated. Results are in qualitative agreement with a model which predicts the existence of microphases in the unstable region of the phase diagram. Quantitative comparison with the theory is performed by fitting the theoretical structure factor to the experimental data. For a narrow range of ionizaiton degrees nearly quantitative agreement with the theory is found for the polyacrylic acide system.

61.25H - 82.70 - 05.90

© Les Editions de Physique 1993