Abstract
The crystal structure of a modification (Form II) of poly(β-propiolactone) was examined by X-ray diffraction. This modification shows a unique X-ray fiber pattern, i.e., discrete reflections on the equatorial line and continuous scatterings on each layer line, which is characteristic of a longitudinal disordered crystal structure. Conventional cell dimensions are a′=7.73, b′=4.48, c(fiber axis)=4.77Å, and γ′=90°. The unit cell contains two planar zigzag chains. The molecular chains pack side-by-side in a regular fashion forming a sheet structure parallel to the a′c plane. However, the mutual levels of the chains along the fiber axis are irregular, i.e., the crystal of Form II is in a paracrystalline state.
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A. S. Ueda, Y. Chatani, and H. Tadokoro, Polym. J., 2, 387 (1971).
R. K. Hasegawa, Y. Chatani, and H. Tadokoro, Polym. J., to be published.
Y. Chatani, K. Suehiro, Y. Okita, H. Tadokoro, and K. Chujo, Makromol. Chem., 113, 215 (1968).
M. Yokouchi, Y. Chatani, H. Tadokoro, K. Teranishi, and H. Tani, Polymer, 14, 267 (1973).
M. Yokouchi, Y. Chatani, H. Tadokoro, and H. Tani, Polym. J., 6, 248 (1974).
A. Turner-Jones and C. W. Bunn, Acta Crystallogr., 15, 105 (1962).
Y. Chatani, Y. Okita, H. Tadokoro, and Y. Yamashita, Polym. J., 1, 555 (1970).
S. Okamura, T. Higashimura, A. Tanaka, R. Kato, and Y. Kikuchi, Macromol. Chem., 54, 226 (1962).
K. Suehiro, unpublished data.
T. Wasai, T. Saegusa, and J. Furukawa, Kogyo Kagaku Zasshi (J. Chem. Soc. Japan, Ind. Chem. Sect.), 67, 601 (1964).
R. Hosemannann S. N. Bagchi, “Direct Analysis of Diffraction by Matter,” North-Holland, 1962.
Y. Chatani, T. Uchida, H. Tadokoro, K. Hayashi, M. Nishii, and S. Okamura, J. Macromol. Sci., Phys., B2, 567 (1968).
Y. Chatani and S. Nakatani, Macromolecules, 5, 597 (1972).
I. Kakinoki, “X-Sen Kesshogaku (X-ray Crystallography),” Vol. II, I. Nitta, Ed., Maruzen, Tokyo, 1961, p 653.
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Suehiro, K., Chatani, Y. & Tadokoro, H. Structural Studies of Polyesters. VI. Disordered Crystal Structure (Form II) of Poly(β-propiolactone). Polym J 7, 352–358 (1975). https://doi.org/10.1295/polymj.7.352
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DOI: https://doi.org/10.1295/polymj.7.352
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