Structure investigation of narrow banded spherulites in polyhydroxyalkanoates by microbeam X-ray diffraction with synchrotron radiation
作者： Toshihisa Tanaka , Masahiro Fujita , Akihisa Takeuchi , Yoshio Suzuki , Kentaro Uesugi
DOI: 10.1016/J.POLYMER.2005.03.064
关键词: Microbeam 、 X-ray crystallography 、 Materials science 、 Synchrotron radiation 、 Optical microscope 、 Diffraction 、 Optics 、 Zone plate 、 Beam (structure) 、 Beam diameter
摘要: Abstract Narrow banded structures of spherulites poly[( R )-3-hydroxybutyrate] (P(3HB)) and its copolymers, with different second monomer unit 4-hydroxybutyrate, 3-hydroxyhexanoate or 6-hydroxyhexanoate, were investigated by microbeam X-ray diffraction Fresnel Zone Plate technique in synchrotron radiation (SPring-8). Radial scanning performed 2 4 μm steps 0.5 μm beam diameter fine microfocus beam. The patterns for P(3HB) homopolymer showed the change crystal orientation along radial direction ( a -axis), while b - c -axes rotated around -axis. intensities diagrams copolymers changed periodically as function distance direction. periodicity measured was matched narrow band spacing (15–25 μm) observed polarized optical microscopy.
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sci-hub.se 参考文章(36)
Developments in crystalline polymers Springer Netherlands. ,(1982) , 10.1007/978-94-009-1341-7
Yoshiharu Kumagai, Youko Kanesawa, Yoshiharu Doi, Enzymatic degradation of microbial poly(3‐hydroxybutyrate) films Macromolecular Chemistry and Physics. ,vol. 193, pp. 53- 57 ,(1992) , 10.1002/MACP.1992.021930105
Hideki Abe, Yoshiharu Doi, Hiromichi Aoki, Takashi Akehata, Yoji Hori, Akio Yamaguchi, Physical Properties and Enzymic Degradability of Copolymers of (R)-3-Hydroxybutyric and 6-Hydroxyhexanoic Acids Macromolecules. ,vol. 28, pp. 7630- 7637 ,(1995) , 10.1021/MA00127A007
G. R. Brown, K. L. Singfield, Optically Active Polyethers. 1. Studies of the Crystallization in Blends of the Enantiomers and the Stereoblock Form of Poly(epichlorohydrin) Macromolecules. ,vol. 28, pp. 1290- 1297 ,(1995) , 10.1021/MA00108A068
H. D. Keith, F. J. Padden, Banding in Polyethylene and Other Spherulites Macromolecules. ,vol. 29, pp. 7776- 7786 ,(1996) , 10.1021/MA960634J
A. Mahendrasingam, C. Martin, W. Fuller, D. J. Blundell, D. MacKerron, R. J. Rule, R. J. Oldman, J. Liggat, C. Riekel, P. Engström, Microfocus X-ray Diffraction of Spherulites of Poly-3-hydroxybutyrate. Journal of Synchrotron Radiation. ,vol. 2, pp. 308- 312 ,(1995) , 10.1107/S0909049595009769
M. I. Abo el Maaty, I. L. Hosier, D. C. Bassett, A unified context for spherulitic growth in polymers Macromolecules. ,vol. 31, pp. 153- 157 ,(1998) , 10.1021/MA9711396
Yoshiharu Doi, Youko Kanesawa, Masao Kunioka, Terumi Saito, Thermal degradation of microbial copolyesters: poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Macromolecules. ,vol. 23, pp. 1933- 1936 ,(1990) , 10.1021/MA00203A006
M Yokouchi, Y Chatani, H Tadokoro, K Teranishi, H Tani, Structural studies of polyesters: 5. Molecular and crystal structures of optically active and racemic poly (β-hydroxybutyrate) Polymer. ,vol. 14, pp. 267- 272 ,(1973) , 10.1016/0032-3861(73)90087-6
Hideki Abe, Yoshiharu Doi, Yoji Hori, Toshimitsu Hagiwara, Physical properties and enzymatic degradability of copolymers of (R)-3-hydroxybutyric acid and (S,S)-lactide Polymer. ,vol. 39, pp. 59- 67 ,(1998) , 10.1016/S0032-3861(97)00240-1