Theory of Hierarchical Lamellar Structures from A(BC)nBA Multiblock Copolymers
Theory of Hierarchical Lamellar Structures from A(BC)nBA Multiblock Copolymers
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DOI：
10.1021/ma801651u
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发表时间：
2009-01
期刊：
影响因子：
5.5
通讯作者：
Weihua Li;A. Shi
中科院分区：
文献类型：
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作者：
Weihua Li;A. Shi
用自洽平均场理论(SCMFT)研究了A(BC)NBA多嵌段共聚物熔体的相行为。得到了层状层状结构对应的SCMFT方程的解。这些结构的自由能被用来构建相图。可以预测，可以形成具有不同内部BC层数目的层状片层结构。稳定片层结构的BC层数由链熵和界面能之间的竞争决定。研究发现，当A块与BC块之间的相互作用比B块与C块之间的相互作用强得多时，更多的BC层被优先考虑。
The phase behavior of A(BC)nBA multiblock copolymer melts is investigated using self-consistent mean-field theory (SCMFT). Solutions of the SCMFT equations corresponding to hierarchical lamellar structures are obtained. The free energy of these structures are used to construct phase diagrams. It is predicted that hierarchical lamellar structures with different number of “internal” BC layers can be formed. The number of BC layers of the stable lamellar structure is determined by the competition between chain entropy and interfacial energy. It is found that more BC layers are preferred when the interactions between A and BC blocks are much stronger than that between B and C blocks.