Spinodal decomposition of symmetric diblock copolymer/homopolymer blends at the Lifshitz point
Spinodal decomposition of symmetric diblock copolymer/homopolymer blends at the Lifshitz point
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对称二嵌段共聚物/均聚物共混物在 Lifshitz 点的旋节线分解
DOI：
10.1063/1.478289
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发表时间：
1999
影响因子：
4.4
通讯作者：
M. Muthukumar
中科院分区：
文献类型：
--
作者：
L. Kielhorn;M. Muthukumar
我们已经推导出一个平均场朗道-金兹伯格自由能表达式的三元对称均聚物/二嵌段共聚物系统从微观爱德华兹哈密顿量。然后，我们使用时间相关的朗道-金兹伯格方程模型的顺序参数的时间演化后，临界淬火到区域的热力学不稳定性在三维空间。我们观察到的累积的二嵌段共聚物的域的界面处，通过驱逐从内部的域。我们还看到饱和的二嵌段共聚物在域粗化，从而形成单独的，共聚物丰富的域。我们相信这些界面饱和效应是域生长减慢的主要原因，因为发现该效应在较高的二嵌段共聚物浓度下更明显。
We have derived a mean field Landau–Ginzburg free energy expression for a ternary symmetric homopolymer/diblock copolymer system from a microscopic Edwards Hamiltonian. We then used the time-dependent Landau–Ginzburg equation to model the time evolution of the order parameters after a critical quench into the region of thermodynamic instability in three dimensions. We observe the accumulation of the diblock copolymer at the interface of the domains through expulsion from the interior of the domains. We also see saturation of the diblock copolymers during domain coarsening and consequently the formation of separate, copolymer-rich, domains. We believe these interfacial saturation effects to be a major reason for the slow down of domain growth as the effect is found to be more pronounced at higher diblock copolymer concentrations.
影响因子：
5.5
作者：
OHTA, T;KAWASAKI, K
通讯作者：
KAWASAKI, K