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| - Capillary-Induced Phase Separation in Mixed Polymer Solutions. A Lattice Mean-FieldCalculation Study
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| - The formation of a capillary phase in segregating mixed polymer solutions confined between two planarwalls is modeled by using a lattice mean-field theory for flexible polymers in solution. A capillary-inducedphase separation (CIPS) may appear in systems where the two polymer components display different preferencefor the wall, the preference being either of energetic or entropic origin. A long-range attractive force operatingbetween the walls across the polymer solution is associated with the CIPS. The CIPS phenomenon is discussedfor two different polymer systems. The effects of the chain length asymmetry, the solution composition, andthe interactions with the walls on the range and the magnitude of the attractive force are presented. Forcompositions near the binodal curve and far from the critical point, the attractive force is very long-rangedand its range exceeds far the dimension of the polymer chains. Polymer distributions between the walls at theonset of the attractive force in the systems are also reported.
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