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- Title
Evaluation of Grain Size by Small-Angle X-Ray Scattering for a Block Copolymer Film in Which Cylindrical Microdomains Are Perpendicularly Oriented.
- Authors
Ohnogi, Hiroshi; Sasaki, Sono; Sakurai, Shinichi
- Abstract
Method of evaluation of grain size of hexagonally-packed cylindrical microdomains is presented by taking as an example the data from the polystyrene-block-polyethylenebutylene-block-polystyrene (SEBS) triblock copolymer film, where the polystyrene cylinders are embedded in the polyethylenebutylene matrix with being oriented perpendicular to the surface of the film. For this purpose, the two-dimensional small-angle X-ray scattering was measured by illuminating X-ray beam from the side of the film. The procedure is similar to the method how to evaluate the crystallite size of polymer, using the peak width of crystalline reflection in the wide-angle X-ray diffraction (WAXD) measurement. While single crystal is used as the standard sample for the case of WAXD because it can be postulated that the crystallite size is infinity in the single crystal, we propose here to use collagen as a standard sample for the SAXS measurement, since collagen forms very regular stacking of texture with 65.3 nm repeating period and the number of the stacking texture is infinitely large. It was confirmed that the grain size evaluated by the SAXS method was in sufficient accord with the result of the transmission electron microscopic observation.
- Subjects
SMALL-angle X-ray scattering; BLOCK copolymers; THIN films; POLYSTYRENE; CRYSTALLINE polymers
- Publication
Macromolecular Symposia, 2016, Vol 366, Issue 1, p35
- ISSN
1022-1360
- Publication type
Article
- DOI
10.1002/masy.201650044