Stratification of foam films made from polyelectrolyte solutions |
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Authors: | D Langevin |
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Institution: | (1) Laboratoire de Physique des Solides, Université Paris-Sud, batiment 510, 91405 Orsay, France, FR |
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Abstract: | Studies of thin liquid films, made from semidilute polyelectrolyte solutions, are presented. The disjoining pressure variation
with film thickness exhibits oscillations, corresponding to film stratification. The oscillations become sharper as the polymer
concentration c increases, and disappear when salt is added. The period of the oscillations scales as c
-1/2. The observed stratification is related to the polymer network and the size of the steps to the mesh size ξ.
Received 25 April 2000 and Received in final form 3 October 2000 |
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Keywords: | PACS 68 15 +e Liquid thin films – 61 25 Hq Macromolecular and polymer solutions polymer melts swelling |
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