Free-Standing Black Films of Polymers: A Model of Charged Brushes in Interaction
- 1 May 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 74 (18) , 3628-3631
- https://doi.org/10.1103/physrevlett.74.3628
Abstract
Free-standing black films drawn from a diblock copolymer aqueous solution were studied by x-ray reflectivity. Because of the hydrophilic part of the copolymer which is a highly charged polyelectrolyte (NaPSS), such films behave as two opposing charged brushes. Above a determined threshold the thickness of the double brush decreases slowly as electrolyte is added. These results are in good agreement with recent mean-field theories.Keywords
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