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Authors
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Jehnichen, D. ; Pospiech, D. ; Ptacek, S. ; Eckstein, K. ; Friedel, P. ; Janke, A. ; Papadakis, C.M.
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Title
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Nanophase-separated diblock copolymers: Structure investigations on PPMA-b-PMMA using X-ray scattering methods
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Date
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15.10.2009
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Number
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18022
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Abstract
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Diblock copolymers show phase separation on the sub-micrometer scale thus giving rise to specially ordered morphologies both in bulk and thin films. One important question is to find out relationships between bulk morphology (determined mainly by molecular parameters, i.e., the block ratio, molar mass, thermal history), and morphologies in thin films, which are strongly influenced by film parameters and film thickness related to bulk domain spacings. PPMA-b-PMMA diblock copolymers with hexagonally close-packed cylinders in the bulk and varied molar masses but identical molar composition were chosen for this study. Thin films with thicknesses below and above the bulk domain spacing were prepared and examined using different X-ray scattering methods using grazing incidence techniques. Additionally, the experimentally found phase behaviour of the diblock copolymers was compared with the calculated phase diagram.
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Publisher
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Zeitschrift für Kristallographie
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Wikidata
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2
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Citation
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Zeitschrift für Kristallographie 30 (2009) S, 485-490
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DOI
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https://doi.org/10.1524/zksu.2009.0072
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Tags
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diblock copolymers nanophase separation nanostructured surfaces morphology characterisation phase diagram block-copolymers thin-films fabrication behavior
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