SELECTIVE ADSORPTION FROM POLYMER MIXTURES ON SOLID SURFACES
Author(s): E.V.Vakarin, M.F.Holovko (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine)
Selective adsorption from binary polymer mixtures on a crystalline surface is studied in terms of the lattice gas model in conjunction with the results of the association theory. An interplay of the selectivity and the surface induced segregation is shown to result in a variety of competing factors which dominate the adsorption process. The role of the bead diameter, chain length and the surface activity in the preferential adsorption of one component is analyzed. A variation of the selectivity coefficient with the density and composition is also discussed.
Key words: adsorption, selectivity, polymer mixtures
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