Polydispersity-induced macrophase separation in diblock copolymer melts
Polydispersity-induced macrophase separation in diblock copolymer melts
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DOI：
10.1103/physrevlett.99.148304
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发表时间：
2007-10-05
影响因子：
8.6
通讯作者：
Matsen, M. W.
中科院分区：
文献类型：
--
作者：
Matsen, M. W.
AB-二嵌段共聚物熔体的相行为上的A-嵌段多分散性的效果检查使用一个完整的自洽场理论治疗，允许分级的母分子量分布。除了观察相界的既定转变，我们发现显着的两相共存区域的出现，例如，复杂的相位窗口的消失。此外，我们发现的证据表明，多分散性减轻包装挫折，这将减少长程有序的趋势。
The effect of A-block polydispersity on the phase behavior of AB-diblock copolymer melts is examined using a complete self-consistent field theory treatment that allows for fractionation of the parent molecular-weight distribution. In addition to observing the established shift in phase boundaries, we find the emergence of significant two-phase coexistence regions causing, for instance, the disappearance of the complex phase window. Furthermore, we find evidence that polydispersity relieves packing frustration, which will reduce the tendency for long-range order.