Abstract
The side chain motion of copoly(γ-methyl L-glutamate-co-γ-n-alkyl L-glutamate) was studied by a spin-probe technique to examine its dependence on the copolymer composition and alkyl side chain length. In a copolymer series with alkyl side chain length n=12 and 15 (where n is number of alkyl carbon), there is a tendency that side chain motion becomes rapid as the degree of substitution of long alkyl side chain (D.S.) increases. At the highest D.S., a copolymer with n=15 forms crystallites composed of long alkyl chains and showed a sudden decrease in the rotational correlation time of spin-probes around the crystalline melt, whereas a copolymer with n=12 did not show such a decrease owing to the smaller side chain crystallite. Correlation time-temperature profile for copoly(γ-benzyl L-glutamate-co-γ-stearyl L-glutamate) (n=18) and that previously reported for copoly(γ-methyl L-glutamate-co-γ-stearyl L-glutamate) (n=18) were quite similar at comparable D.S. except for a small D.S. region. This means that motion of long alkyl side chain is not affected by short side chains.
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J. Watanabe, H. Ono, I. Uematsu, and A. Abe, Macromolecules, 18, 2141 (1985).
J. Watanabe, M. Goto, and T. Nagase, Macromolecules, 20, 298 (1987).
J. Watanabe and T. Nagase, Polym. J., 19, 781 (1987).
T. Yamanobe, M. Tsukahara, T. Komoto, J. Watanabe, I. Ando, I. Uematsu, K. Deguchi, T. Fujito, and M. Imanari, Macromolecules, 21, 48 (1988).
M. Yamaguchi and A. Tsutsumi, Polym. J., 22, 781 (1990).
L. J. Berliner (Ed.), “Spin Labeling,” Theory and Applications, Academic Press, New York, N.Y., 1976.
P. Meurisse, C. Friedrich, M. Devolaitzky, F. Laupretre, C. Noel, and L. Monnerie, Macromolecules, 17, 72 (1984).
A. Tsutsumi, K. Hikichi, T. Takahashi, Y. Yamashita, N. Matsushima, M. Kanake, and M. Kaneko, J. Macromol. Sci. Phys., B8, 413 (1973).
N. Kusumoto, in “Molecular Motion in Polymer by ESR,” R. F. Boyer and S. E. Keinath, Ed., Harwood, Chur, 1980.
J. H. Freed, J. Chem. Phys., 41, 2077 (1964).
A. L. Kovarskii, A. M. Vasserman, and A. L. Buchachenko, Vyskomol. Soyedin., Ser. A, 13, 1647 (1971).
S. A. Goldman, G. V. Bruno, and J. H. Freed, J. Chem. Phys., 76, 1858 (1972).
A. Tsutsumi, Jpn. J. Appl. Phys., 9, 1125 (1970).
Y. Yamashita, A. Tsutsumi, K. Hikichi, and M. Kaneko, Polym. J., 8, 114 (1976).
A. M. Vasserman, A. N. Kuznetsov, A. L. Kovarskii, and A. L. Bulachenko, J. Struct. Chem., 12, 555 (1971).
D. Kivelson, in “Rotational Dynamics of Small and Macromlecules,” Th. Dorfmuler, R. Pecora, Ed., Springer-Verlag, Berlin, 1986, p 1.
Z. Veksli and W. G. Miller, Macromolecules, 10, 1245 (1977).
K. Hikichi, K. Saito, M. Kaneko, and J. Furuichi, J. Phys. Soc. Jpn., 19, 557 (1964).
Y. Yamashita, A. Tsutsumi, K. Hikichi, and M. Kaneko, Polym. J., 8, 114 (1975).
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Yamaguchi, M., Tezuka, M. & Tsutsumi, A. Side Chain Motion of Poly(L-glutamate)s Having Long Alkyl Side Chains as Studied by Spin-Probe Technique. Polym J 23, 55–64 (1991). https://doi.org/10.1295/polymj.23.55
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DOI: https://doi.org/10.1295/polymj.23.55