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Equilibrium behavior of confined triblock copolymer films

机译：受限三嵌段共聚物薄膜的平衡行为

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Using a two-dimensional self-consistent field calculation, we determine the equilibrium morphology of thin films of ABC triblock copolymers confined between hard, smooth plates. The B segment is chosen to be the central block and all the blocks are incompatible. The chains microphase-segregate into a lamellar phase, with the stripes either perpendicular or parallel to the walls. When all the monomer-surface interactions are identical, the perpendicular orientation has the lowest free energy. When a repulsion is introduced between the surface and the A and C monomers, the surface interactions further stabilize the perpendicular orientation. At strong surface interactions, the morphology of the perpendicular structure is controlled by the overall thickness of the molten layer. In comparing diblocks to triblocks as candidates for forming laterally patterned films, our work indicates that triblocks possess distinct advantages over diblocks. First, no special effort needs to be taken to establish neutral surfaces. Second, the film does not have to be confined between two substrates. Thus, triblocks can be used to fabricate patterned polymer surfaces, which can be used for novel optical or electronic applications. [References: 17]
机译：使用二维自洽场计算，我们确定了硬质光滑板之间限制的ABC三嵌段共聚物薄膜的平衡形态。选择B段作为中心块，并且所有块都不兼容。链微相分离成层状相，条带垂直或平行于壁。当所有单体-表面相互作用均相同时，垂直方向的自由能最低。当在表面与A和C单体之间引入排斥力时，表面相互作用进一步稳定了垂直方向。在强烈的表面相互作用下，垂直结构的形貌由熔融层的总厚度控制。在比较二嵌段与三嵌段作为形成横向图案化膜的候选者时，我们的工作表明三嵌段比二嵌段具有明显的优势。首先，不需要特别的努力来建立中性表面。其次，膜不必限制在两个基板之间。因此，三嵌段可用于制造图案化的聚合物表面，其可用于新颖的光学或电子应用。 [参考：17]

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