Abstract
Thin films of natural rubber (NR) or polychloroprene (CR) were made by casting a 2.0 wt% solution in benzene onto the water surface, and some of them were prestretched up to a desired amount of strain (mostly, about 200%) at ambient temperature. The specimens thus prepared were then crystallized at −25°C for NR or at −5°C for CR in a transmission electron microscope (TEM) column with a cryo-transfer specimen-holder and examined by TEM observation without any electron staining. Morphological observations in bright- and dark-field imaging modes and selected-area electron diffraction analysis revealed directly the following: The “α-filaments” in NR reported by Andrews [Proc. R. Soc. A, 277, 562 (1964)] and the filaments in CR (corresponding to the α-filaments in NR) reported by Andrews and Reeve [J. Mater. Sci., 6, 547 (1971)], both of which are observed in the TEM images to orient perpendicularly to the prestretching direction, are undoubtedly identified as edge-on lamellar crystals.
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References
E. H. Andrews, Proc. R. Soc. A, 270, 232 (1962).
E. H. Andrews, Proc. R. Soc. A, 277, 562 (1964).
E. H. Andrews, J. Polym. Sci., 4, 668 (1966).
E. H. Andrews, Pure Appl. Chem., 31, 91 (1972).
E. H. Andrews, P. J. Owen, and A. Singh, Proc. R. Soc. London A, 324, 79 (1971).
E. H. Andrews, P. J. Owen, and A. Singh, Rubber Chem. Technol., 45, 1315 (1972).
P. E. Reed, Proc. R. Soc. London A, 338, 459 (1974).
B. C. Edwards, J. Polym. Sci., Polym. Phys. Ed., 13, 1387 (1975).
B. C. Edwards and P. J. Phillips, J. Polym. Sci., Polym. Phys. Ed., 13, 2117 (1975).
E. H. Andrews and B. Reeve, J. Mater. Sci., 6, 547 (1971).
J. T. Maynard and W. E. Mochel, J. Polym. Sci., 18, 227 (1955).
V. Grmela and L. Megarskaya, Polym. Sci. USSR, 10, 1196 (1968).
T. Shimizu, M. Tsuji, and S. Kohjiya, Mater. Sci. Res. Intl., 4, 117 (1998).
C. W. Bunn, Proc. R. Soc. A, 180, 40 (1942).
S. C. Nyburg, Acta Crystallogr., 7, 385 (1954).
G. Natta and P. Corradini, Angew. Chem., 68, 615 (1956).
G. Natta and P. Corradini, Nuovo Cimento Suppl., 15, 111 (1960).
H. Mark and G. V. Susich, Kolloid-Z., 46, 11 (1928).
H. A. Morss, Jr., J. Am. Chem. Soc., 60, 237 (1938).
S. D. Gehman and J. E. Field, J. Appl. Phys., 10, 564 (1939).
S. Murakami, Y. Nishikawa, M. Tsuji, A. Kawaguchi, S. Kohjiya, and M. Cakmak, Polymer, 36, 291 (1995).
S. Murakami, M. Yamakawa, M. Tsuji, and S. Kohjiya, Polymer, 37, 3945 (1996).
T. Shimizu, M. Tsuji, and S. Kohjiya, J. Mater. Res., 14, 1645 (1999).
J. Petermann and H. Gleiter, Phil. Mag., 31, 929 (1975).
M. J. Hill and A. Keller, J. Macromol. Sci.-Phys., B3, 153 (1969).
T. Amano, S. Kajita, and K. Katayama, Progr. Colloid Polym. Sci., 58, 108 (1975).
K. Katayama, Sen-i Gakkaishi, 34, P-63 (1978).
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Tsuji, M., Shimizu, T. & Kohjiya, S. TEM Studies on Thin Films of Natural Rubber and Polychloroprene Crystallized under Molecular Orientation. Polym J 31, 784–789 (1999). https://doi.org/10.1295/polymj.31.784
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DOI: https://doi.org/10.1295/polymj.31.784
