Effect of Architecture on the Phase Behavior of AB-Type Block Copolymer Melts
Effect of Architecture on the Phase Behavior of AB-Type Block Copolymer Melts
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DOI：
10.1021/ma202782s
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发表时间：
2012-02-28
期刊：
影响因子：
5.5
通讯作者：
Matsen, M. W.
中科院分区：
文献类型：
--
作者：
Matsen, M. W.
采用自洽场理论（SCFT）计算了一系列双组分嵌段共聚物体系的平衡相图。相图的拓扑结构相对不受体系结构差异的影响，但相边界在组成上发生了显著变化。这种转变与Gido及其同事提出的将架构分解为组成单元的方法是一致的，但在中间隔离制度中，与这一原则存在显著的定量偏差。虽然复相窗口继续由螺旋（G）相占主导地位，但新发现的Fddd（O-70）相区域对于某些结构变得明显，并且当复相窗口向高成分不对称性移动时，穿孔层状（PL）相变得稳定。
Equilibrium phase diagrams are calculated for a selection of two-component block copolymer architectures using self-consistent field theory (SCFT). The topology of the phase diagrams is relatively unaffected by differences in architecture, but the phase boundaries shift significantly in composition. The shifts are consistent with the decomposition of architectures into constituent units as proposed by Gido and co-workers, but there are significant quantitative deviations from this principle in the intermediate-segregation regime. Although the complex phase windows continue to be dominated by the gyroid (G) phase, the regions of the newly discovered Fddd (O-70) phase become appreciable for certain architectures and the perforated-lamellar (PL) phase becomes stable when the complex phase windows shift toward high compositional asymmetry.