Kinetics of morphological transitions in microphase-separated diblock copolymers
Kinetics of morphological transitions in microphase-separated diblock copolymers
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DOI：
10.1021/ma049687o
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发表时间：
2004-07-27
期刊：
影响因子：
5.5
通讯作者：
Ohta, T
中科院分区：
文献类型：
--
作者：
Yamada, K;Nonomura, M;Ohta, T
我们研究了两嵌段共聚物中微相分离结构之间的形态转变。在双模近似下，研究了弱偏聚区有序-无序（ODT）和有序-有序转变（OOT）的动力学。极限的研究通过数值求解一组耦合的振幅方程的基本模式。详细探讨了形态转变过程中畴的分裂和重连。此外，我们还识别了在ODT和OOT过程中出现的亚稳或不稳定的中间结构。线性稳定性分析也适用于看到最不稳定的模式时，层状结构是不稳定的。
We study morphological transitions between microphase-separated structures in diblock copolymers. By means of the two-mode approximation, kinetics of order-disorder (ODT) and order-order transitions (OOT) in the weak-segregation. limit are investigated by solving numerically a coupled set of the amplitude equations for the fundamental modes. Breakup and reconnection of domains during the morphological transitions are explored in detail. Furthermore, we identify the metastable or unstable intermediate structures which appear in the process of ODT and OOT. The linear stability analysis is also applied to see the most unstable mode when a lamellar structure is destabilized.