Abstract
A styrene—acrylonitrile copolymer was synthesized by radiation-induced copolymerization in ethyl bromide at −78°C.The chemical-composition distribution curve of the sample obtained from the results of compositional fractionation is not continuous, but shows two distinctly different peaks. The acrylonitrile contents of the two peaks are close to those of copolymers polymerized by anionic and free-radical mechanisms, respectively. From this result, it becomes clear that the copolymer sample is a mixture of two kinds of copolymers polymerized by both mechanisms, and it is also clear that both anionic and free-radical mechanisms coexist in this copolymerization process.Moreover, it is shown that the copolymer may have a chemical composition corresponding to an anionic mechanism only if the reaction mixture is highly dried under vacuum.
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H. Yamaoka, K. Nishiyama, K. Hayashi, and S. Okamura, Kobunshi Kagaku (Chem. High Polymers), 24, 649 (1967).
A. P. Sheinker, M. K. Yakovlieva, E. V. Kristalinii, and A. D. Abkin, Dokl. Acad. Nauk SSSR, 124, 632 (1959).
Y. Tabata, Y. Hashizume, and H. Sobue, J. Polym. Sci., Part A, 2, 2647 (1964).
Y. Tabata, Y. Hashizume, and H. Sobue, J. Polym. Sci., Part A, 2, 3649 (1964).
Y. Tsuda, J. Polym. Sci., 54, 193 (1961).
Y. Tsuda, J. Polym. Sci., 58, 289 (1962).
S. Teramachi and M. Nagasawa, J. Macromol. Sci., Chem., A2, 1169 (1968).
R. G. Fordyce, J. Am. Chem. Soc., 69, 1903 (1947).
N. L. Zutty and F. J. Welch, J. Polym. Sci., 43, 445 (1960).
L. P. Mezhirova, A. P. Sheinker, and A. D. Abkin, Vysokomol. Soedin., 3, 99 (1961).
S. Teramachi and Y. Kato, J. Macromol. Sci., Chem., A4, 1985 (1970).
G. Goldflnger and M. Steidlitz, J. Polym. Sci., 59, 163 (1963).
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Teramachi, S., Uchiyama, H. The Chemical-Composition Distribution of Styrene—Acrylonitrile Copolymer Synthesized by Radiation-Induced Copolymerization at Low Temperature. Polym J 5, 243–247 (1974). https://doi.org/10.1295/polymj.5.243
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DOI: https://doi.org/10.1295/polymj.5.243