| 초록 |
In recent years, it has been demonstrated that noncovalent bonds such as hydrogen bond can be used advantageously for the molecular construction of well ordered nanostructures. Using such physical bondings replacing covalent bonds, thermoreversible copolymer-like clusters can be constructed, and hence laborious synthetic effort in preparing copolymers is often much saved. In the present work, we theoretically investigate the phase behavior of reversibly associating ABC triblock copolymer-like ternary blends system. Our model system consists of three different species of functionalized homopolymers (denoted by A, B and C). One-end functionalized A- and C-chains can associate with two-end functionalized B-chains to form various kinds of block copolymer-like clusters, which leads to complicated phase behavior involving micro- and macrophase separation. To theoretically construct phase diagrams for the model system, the cluster distribution was obtained and used for RPA (Random Phase Approximation) equations as input. Using this theory stability limit of macro- and microphase as a function of molecular parameters was calculated.
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