Pattern formation in microphase-separating copolymer gels
Pattern formation in microphase-separating copolymer gels
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微相分离共聚物凝胶中的图案形成
DOI：
10.1088/0953-8984/16/4/l01
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
N. Uchida
中科院分区：
文献类型：
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作者：
N. Uchida
用时间相关的金兹堡-朗道模型研究了交联二嵌段共聚物的微相分离。分离后，原先在均相中交联的聚合物平行于组成梯度拉长。我们考虑了这种弹性耦合以及由无序网络结构引起的随机应力。数值模拟了相排序过程，研究了畴形态。随机应力破坏了片层的长程取向顺序，形成锯齿状界面，导致结构因子出现不对称峰。
Microphase separation in crosslinked diblock copolymers is investigated with a time-dependent Ginzburg–Landau model. Upon separation, polymers originally crosslinked in the homogeneous phase elongate parallel to the composition gradient. We take into account this elastic coupling as well as the random stress caused by the disordered network structure. The phase ordering process is numerically simulated to study the domain morphology. The random stress destroys the long-range orientational order of lamellae and creates jagged interfaces, which give rise to an asymmetric peak in the structure factor.