Lateral Phase Separation in Grafted Diblock Copolymer Films
Lateral Phase Separation in Grafted Diblock Copolymer Films
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DOI：
10.1021/ma101093f
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发表时间：
2010-09
期刊：
影响因子：
5.5
通讯作者：
B. M. O'driscoll;G. Griffiths;M. Matsen;S. Perrier;V. Ladmiral;I. Hamley
中科院分区：
文献类型：
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作者：
B. M. O'driscoll;G. Griffiths;M. Matsen;S. Perrier;V. Ladmiral;I. Hamley
利用原子力显微镜研究了不同组成和分子量的聚苯乙烯-聚甲基丙烯酸甲酯嵌段共聚物系链膜，并将观察到的结构与理论预测进行了比较。虽然实验结果在定性上与理论一致，但在定量上存在显著差异。这是由于在退火之前和退火过程中薄膜中存在溶剂，这一假设得到了本文报道的新的初步计算的支持。在膜上进行了溶剂交换实验（两种聚合物块的良好溶剂逐渐被选择性溶剂取代）。这个过程产生了有纹理的薄膜，其中的结构是由聚合物块与第二种溶剂的混溶性决定的。
Tethered films of polystyrene-block-poly(methyl methacrylate) copolymers of varying composition and molecular weight were investigated using atomic force microscopy and the observed structures compared with theoretical predictions. Although the experimental results were in qualitative agreement with the theory, there was significant quantitative variation. This was attributed to the presence of solvent in the films prior to and during annealing, a hypothesis supported by new preliminary calculations reported here. Solvent exchange experiments (where a good solvent for both polymer blocks was gradually replaced by a selective solvent), were also performed on the films. This procedure generated textured films in which the structure was defined by miscibility of the polymer blocks with the second solvent.