Abstract
An ESR study on the radical polymerization of triphenylmethyl methacrylate was carried out in 2-methyltetrahydrofuran over a temperature range from −90°C to 30°C. A well-resolved 9-line spectrum was observed at−90°C, a 5-line spectrum at −50°C, and a 13-line spectrum at 0°C. When the observation temperature was raised from 0°C to 30°C, a 5-line spectrum was recorded again. This change in the spectrum with temperature was explained on the basis of two stable conformations and the interchange between them through the free rotation of the radical end. The existence of these two conformations was supported by the calculation of conformation energy.
Similar content being viewed by others
Article PDF
References
M. Kamachi, J. Satoh, D. J. Liaw, and S. Nozakura, Macromolecules, 10, 501 (1977).
M. Kamachi, D. J. Liaw, and S. Nozakura, Polym. J., 9, 307 (1977).
M. Kamachi, J. Satoh, and S. Nozakura, J. Polym. Sci., Polym. Chem. Ed., 16, 1789 (1978).
M. Kamachi, D. J. Liaw, and S. Nozakura, Polym. J., 11, 921 (1979).
M. Kamachi, D. J. Liaw, and S. Nozakura, Polym. J., 13, 41 (1981).
M. Kamachi, M. Kohno, D. J. Liaw, and S. Katsuki, Polym. J., 10, 69 (1978).
H. Yuki, K. Hatada, T. Niinomi, and Y. Kikuchi, Polym. J., 1, 36 (1970).
H. Tadokoro, “Structure of Crystalline Polymers,” Wiley, New York, 1979, pp 323—352.
H. Tadokoro, K. Tai, M. Yokoyama, and M. Kobayashi, J. Polym. Sci., Polym. Phys. Ed., 11, 825 (1973).
M. Iwasaki and Y. Sakai, J. Polym. Sci., A-1, 7, 1537 (1969).
J. H. Freed, “Spin Labeling, Theory and Applications,” L. J. Berliner, Ed., New York, 1976, pp 53—121.
E. Murakami and J. Sohma, Jpn. J. Appl. Phys., 18, 415 (1979).
M. H. Bowden and J. H. O’Donnell, J. Phys. Chem., 72, 1577 (1968).
Y. Sakai and M. Iwasaki, J. Polym. Sci., A-1, 7, 1749 (1969).
J. Sohma, T. Komatsu, and H. Kashiwabara, J. Polym. Sci., B, 3, 287 (1965).
M. S. Symmons, J. Chem. Soc., 1186 (1963).
S. E. Bresler, E. N. Kozbekov, V. N. Fomichev, and V. V. Shadin, Makromol. Chem., 175, 2875 (1973).
J. A. Haris, O. Hinojosa, and J. C. Arther, Jr., J. Polym. Sci., Polym. Chem. Ed., 11, 3215 (1973).
M. Kamachi, Y. Kuwae, and S. Nozakura, to be published.
J. E. Wertz and J. R. Bolton, “Electron Spin Resonance, Elementary Theory and Practical Applications,” McGraw-Hill, New York, 1972, pp 192—222.
B. C. Gilbert and M. Trenwith, J. Chem. Soc., Perkin Trans 2, 1834 (1973).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kamachi, M., Kuwae, Y., Nozakura, Si. et al. Conformation of the Propagating Radical of Triphenylmethyl Methacrylate as Studied by ESR. Polym J 13, 919–925 (1981). https://doi.org/10.1295/polymj.13.919
Issue Date:
DOI: https://doi.org/10.1295/polymj.13.919