Thermodynamic Free Energy Behavior of Diblock Copolymer Chains Confined Between Planar Surfaces Having End-Tethered Flexible Polymer Molecules
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"Thermodynamic Free Energy Behavior ..." refers background in this paper
...This confined state,[40] that is present even with significant variations in block lengths of the PSPI chains (20%–60% PS fraction), was found to be quite persistent, especially so without a disruption of the equilibrium ordered morphology of the block copolymer bulk matrix phase (in lamellar and cylindrical as well as gyroid phases) and no discontinuity around the order–disorder transition....
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...The intercalation of poly(styrene-b-isoprene) (PSPI) between clay (layered silicates) platelets provides a classic system[34,40] in which the confining flat surfaces (clay platelets) contain end-tethered organic hydrophobic molecules that can interact favorably with one of the blocks and also one of the blocks (PS) interacts favorably with the clay surface itself via dipolar interactions (due to the phenyl rings in PS chains)....
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