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Validity of the scaling functional approach for polymer interfaces as a variational theory
We discuss the soundness of the scaling functional (SF) approach proposed by
Aubouy Guiselin and Raphael (Macromolecules 29, 7261 (1996)) to describe
polymeric interfaces. In particular, we demonstrate that this approach is a
variational theory. We emphasis the role of SF theory as an important link
between ground-state theories suitable to describe adsorbed layers, and
"classical" theories for polymer brushes.Comment: 8 pages, 1 figure, to be published in Phys. Rev.