Abstract
Dielectric measurements of samples of poly(β-benzyl-L-aspartate) in the α and ω forms were performed over the frequency range from 30 Hz to 1 MHz and at temperatures from −40 to 140°C. A dispersion peak arising from the molecular motion of the side chain was found and is discussed in detail. The activation energies estimated from the Arrhenius plot were very similar for the α form and the ω form. The Cole—Cole plot showed that (ε0−ε∞) of the α form is almost equal to that of the ω form or is a little larger. But the dispersion temperature of the α form is higher than that of the α form. On the basis of our experimental results, the motion of the carbonyl group in the side chain was discussed in relation to the interaction between the main chain and the side chain.
Similar content being viewed by others
Article PDF
References
K. Hikichi, J. Phys. Soc., Jpn., 19, 2169 (1964).
S. Ogawa, H. Obata, and T. Hatakeyama, Proceedings of the Fifth International Congress on Rheology, 3, 385 (1970).
H. Obata and H. Kanetsuna, J. Polym. Sci., Part A-2, 9, 1977 (1971).
F. Happey, D. W. Jones, and B. M. Watson, Biopolymers, 10, 2039 (1971).
K. Hikichi, K. Saito, M. Kaneko, and J. Furuichi, J. Phys. Soc., Jpn., 19, 577 (1964).
S. Sugai, K. Kamashima, S. Makino, and J. Noguchi, J. Polym. Sci., Part A-2, 4, 183 (1966).
S. Sugai, K. Kamashima, and M. Kunikane, J. Phys. Soc., Jpn., 23, 905 (1967).
T. Fukuzawa, Y. Uematsu, and I. Uematsu, Rep. Prog. Polym. Phys. Jpn., 15, 621 (1972).
S. Tsuchiya, J. Watanabe, Y. Uematsu, and I. Uematsu, Rep. Prog. Polym. Phys. Jpn., 15, 637 (1972).
E. M. Bradbury, A. R. Downie, A. Elliott, and W. E. Hanby, Proc. Roy. Soc. A, 259, 110 (1960).
E. M. Bradbury, L. Brown, A. R. Downie, A. Elliott, R. D. B. Fraser, and W. E. Hanby, J. Mol. Biol., 5, 230 (1962).
H. Leuchs, Ber., 39, 857 (1906).
P. Doty, S. H. Bradbury, and A. M. Holtzer, J. Am. Chem. Soc., 78, 947 (1956).
K. S. Cole and R. H. Cole, J. Chem. Phys., 9, 341 (1941).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Tsujita, Y., Uematsu, I. Dielectric Properties of Poly(β-benzyl-L-aspartate). Polym J 6, 274–278 (1974). https://doi.org/10.1295/polymj.6.274
Issue Date:
DOI: https://doi.org/10.1295/polymj.6.274