Microdomain morphology of thin ABC triblock copolymer films
Microdomain morphology of thin ABC triblock copolymer films
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DOI：
10.1021/ma981321m
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发表时间：
1999-02-23
期刊：
影响因子：
5.5
通讯作者：
Krausch, G
中科院分区：
文献类型：
--
作者：
Elbs, H;Fukunaga, K;Krausch, G
我们结合扫描力显微镜实验和在不同溶剂蒸汽中的非原位膨胀来研究ABC三嵌段共聚物薄膜（聚苯乙烯-b-2-乙烯基吡啶-b-甲基丙烯酸叔丁酯）的微畴结构。我们证明了在选择性蒸气中短暂处理和随后的干燥导致表面形貌的特征变化。然后使用不同的溶剂可以明确地识别表面上存在的不同相。该方法是建立在研究已知形态的共混聚合物和二嵌段共聚物共聚物薄膜的基础上的。然后将其应用于BBC三嵌段共聚物薄膜的先验未知形态。结果表明，聚合物表面是横向微相分离的，这与最近的理论观点一致，该结论得到了XPS测量结果的证实。
We combine scanning force microscopy experiments with ex-situ swelling in different solvent vapors to investigate the microdomain structure of a thin ABC triblock copolymer film (poly(styrene-b-2-vinylpyridine-b-tert-butyl methacrylate)). We demonstrate that short treatment in a selective vapor and subsequent drying lead to characteristic changes in the surface morphology. The use of different solvents then allows to unambiguously identify the different phases present at the surface. This approach is established studying polymer blend and diblock copolymer copolymer thin films of known known morphology. It is then applied to the a priori unknown morphology of the BBC triblock copolymer thin film. The results indicate a laterally microphase-separated polymer surface in agreement with recent theoretical considerations, The conclusions are corroborated by XPS measurements monitoring the average surface composition of the copolymer films.