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Nonclassical Spherical Packing Phases Self-Assembled from AB-Type Block Copolymers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-10-27 00:00:00 , DOI: 10.1021/acsmacrolett.7b00756 Weihua Li 1 , Chao Duan 1 , An-Chang Shi 2
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-10-27 00:00:00 , DOI: 10.1021/acsmacrolett.7b00756 Weihua Li 1 , Chao Duan 1 , An-Chang Shi 2
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Among the various ordered morphologies self-assembled from block copolymers, the spherical packing phases are particularly interesting because they resemble the familiar atomic crystals. The commonly observed spherical morphology of block copolymers is the body-centered-cubic phase. Recently, a number of novel spherical packing phases, i.e., the complex Frank–Kasper phases originally obtained in metallic alloys, have been observed in block copolymer melts. Theoretical studies have revealed that conformational asymmetry of the different blocks provides a key mechanism to stabilize the Frank–Kasper phases. Furthermore, local segregation of different copolymers in blends of diblock copolymers and copolymer architectures provides additional mechanisms to enhance the stability of the complex ordered phases. In this Viewpoint we summarize recent advances in our understanding of the formation of the nonclassical spherical packing phases in AB-type block copolymers, emphasizing the formation mechanisms of these fascinating complex ordered structures.
中文翻译：
AB 型嵌段共聚物自组装的非经典球形填充相
在嵌段共聚物自组装的各种有序形态中，球形填充相特别有趣，因为它们类似于熟悉的原子晶体。嵌段共聚物常见的球形形态是体心立方相。最近，在嵌段共聚物熔体中观察到了许多新的球形填充相，即最初在金属合金中获得的复杂的 Frank-Kasper 相。理论研究表明，不同嵌段的构象不对称性提供了稳定 Frank-Kasper 相的关键机制。此外，在二嵌段共聚物和共聚物结构的共混物中，不同共聚物的局部偏析为提高复杂有序相的稳定性提供了额外的机制。
更新日期：2017-10-27
中文翻译：
AB 型嵌段共聚物自组装的非经典球形填充相
在嵌段共聚物自组装的各种有序形态中，球形填充相特别有趣，因为它们类似于熟悉的原子晶体。嵌段共聚物常见的球形形态是体心立方相。最近，在嵌段共聚物熔体中观察到了许多新的球形填充相，即最初在金属合金中获得的复杂的 Frank-Kasper 相。理论研究表明，不同嵌段的构象不对称性提供了稳定 Frank-Kasper 相的关键机制。此外，在二嵌段共聚物和共聚物结构的共混物中，不同共聚物的局部偏析为提高复杂有序相的稳定性提供了额外的机制。
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