Microdomain morphology of lamella‐forming diblock copolymer confined in a thin film |
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| Authors: | Linli He Linxi Zhang Haojun Liang |
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| Affiliation: | 1. Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China;2. Department of Physics, Wenzhou University, Wenzhou 325027, People's Republic of China;3. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, People's Republic of China |
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| Abstract: | We report the self‐consistent field theory (SCFT) of the morphology of lamella‐forming diblock copolymer thin films confined in two horizontal symmetrical/asymmetrical surfaces. The morphological dependences of thin films on the polymer‐surface interactions and confinement, such as film thickness and confinement spatial structure, have been systematically investigated. Mechanisms of the morphological transitions can be understood mainly through the polymer‐surface interactions and confinement entropy, in which the plat confinement surface provides a surface‐induced effect. The confinement is expressed in the form of the ratio D/L0, here D is film thickness, and L0 is the period of bulk lamellar‐structure. Much richer morphologies and multiple surface‐induced morphological transitions for the lamella‐forming diblock copolymer thin films are observed, which have not been reported before. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1–10, 2009 |
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| Keywords: | block copolymers diblock copolymer morphology self‐assembly self‐consistent field theory thin films |
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