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Co-existing handednesses of lamella twisting in one spherulite observed with scanning microbeam wide-angle X-ray scattering |
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| Authors: | Yoshinobu Nozue Satomi Hirano Naohiko Kawasaki Atsuo Iida Yoshiyuki Amemiya |
| Affiliation: | a Department of Applied Physics, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan b Department of Frontier Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan c Faculty of Applied Biological Science, Hiroshima University, Higashihiroshima 739-8527, Japan d Material Science Division II, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan |
| Abstract: | In poly(ε caprolacton) (PCL)/poly(vinyl butyral) (PVB) blend which forms band spherulite, some straight lines along the radial direction of the spherulites are observed under polarized optical microscope (POM). By using microbeam scanning WAXS, we have investigated the handedness of lamella twisting on the left and right sides of the straight line. As a result, we have observed that the manner of periodic change of 110 reflection in WAXS is reversed between left and right sides of the straight line with respect to the direction of the X-ray beam scanning. This result clearly shows that the straight line observed under POM is the boundary line of handedness in band spherulite, and further, that both handednesses co-exist within one spherulite. It also implies that the lamellae growing from one nucleus are twisted cooperatively only with neighboring lamellae but not with all lamellae in the spherulite of PCL/PVB. |
| Keywords: | Microbeam WAXS Band spherulite |
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