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Morphology change of asymmetric diblock copolymer micellar films during solvent annealing

Title
Morphology change of asymmetric diblock copolymer micellar films during solvent annealing
Authors
Li X.Peng J.Wen Y.Kim D.H.Knoll W.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2007
Journal Title
Polymer
ISSN
0032-3861JCR Link
Citation
vol. 48, no. 8, pp. 2434 - 2443
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The morphology change of an asymmetric polystyrene-block-poly(2-vinyl pyridine) (PS-b-PVP) diblock copolymer micellar film was investigated during solvent vapor annealing in chloroform. Initially, smaller islands in nanometer-length scale form at the film surface. Further annealing results in the growth of the islands composed of the PS-b-PVP cylinders above the bottom brush layer. For comparison, a film of the block copolymer prepared from THF solution (without micellar structure) was also studied. The surface morphology of the film from THF evolves via spinodal dewetting mechanism during solvent vapor annealing. At a long time solvent vapor annealing, the two kinds of the films display the same surface morphologies, which are determined by the interplay between the surface field and autodewetting. © 2007 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.polymer.2007.02.054
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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