Abstract
A set of oligo- and poly(α-methylstyrene) samples were prepared by anionic polymerization, giving particular attention to the polymerization temperature and the initial monomer concentration. The samples were characterized by 1H and 13C NMR spectroscopy and also by three kinds of two-dimensional NMR spectroscopy. It is shown that they have almost the same value 0.72±0.01 of the fraction fr of racemo diads independent of molecular weight, indicating that they are adequate for a study of dilute polymer solutions within the new framework of polymer solution science based on the helical wormlike chain model.
Similar content being viewed by others
Article PDF
References
T. Konishi, T. Yoshizaki, J. Shimada, and H. Yamakawa, Macromolecules, 22, 1921 (1989); and succeeding papers.
H. Yamakawa, “Helical Wormlike Chains in Polymer Solutions,” Springer, Berlin, 1997.
H. Yamakawa, Polym. J., 31, 109 (1999).
Y. Tamai, T. Konishi, Y. Einaga, M. Fujii, and H. Yamakawa, Macromolecules, 23, 4067 (1990).
D. Y. Yoon and P. J. Flory, Polymer, 16, 645 (1975).
M. Fujii, K. Nagasaka, J. Shimada, and H. Yamakawa, Macromolecules, 16, 1613 (1983).
P. R. Sundararajan, Macromolecules, 10, 623 (1977).
T. Kato, K. Miyaso, I. Noda, T. Fujimoto, and M. Nagasawa, Macromolecules, 3, 777 (1970).
I. Noda, K. Mizutani, T. Kato, T. Fujimoto, and M. Nagasawa, Macromolecules, 3, 787 (1970).
Y. Tsunashima, Ph.D. Thesis, Kyoto Univ., Kyoto, Japan, 1972.
J. W. Mays, N. Hadjichristidis, W. W. Graessley, and L. J. Fetters, J. Polym. Sci., Polym. Phys., 24, 2554 (1986).
J. Li, S. Harville, and J. W. Mays, Macromolecules, 30, 466 (1997).
H. Yamakawa, “Modern Theory of Polymer Solutions,” Harper & Row, New York, N.Y., 1971.
O. Kratky and G. Porod, Rec. Trav. Chim., 68, 1106 (1949).
K.-F. Elgert and E. Seiler, Makromol. Chem., 145, 95 (1971).
R. Wicke and K.-F. Elgert, Makromol. Chem., 178, 3075 (1977).
T. Konishi, T. Yoshizaki, and H. Yamakawa, Polym. J., 20, 175 (1988).
T. Konishi, Y. Tamai, M. Fujii, Y. Einaga, and H. Yamakawa, Polym. J., 21, 329 (1989).
M. Kamijo, N. Sawatari, T. Konishi, T. Yoshizaki, and H. Yamakawa, Macromolecules, 27, 5697 (1994).
M. Osa, T. Yoshizaki, and H. Yamakawa, Macromolecules, to be submitted.
MOPAC Version 6.01, J. J. P. Stewart, Frank J. Seiler Research Laboratory, U. S. Air Force Academy, Colorado Springs, Colorado 80840-6528, USA.
Gaussian 98, Revision A. 6, M.J. Frisch, G.W. Trucks, H.B. Schlegel, G.E. Scuseria, M.A. Robb, J.R. Cheeseman, V.G. Zakrzewski, J.A. Montgomery, Jr., R.E. Stratmann, J.C. Burant, S. Dapprich, J.M. Millam, A.D. Daniels, K.N. Kudin, M.C. Strain, O. Farkas, J. Tomasi, V. Barone, M. Cossi, R. Cammi, B. Mennucci, C. Pomelli, C. Adamo, S. Clifford, J. Ochterski, G.A. Petersson, P.Y. Ayala, Q. Cui, K. Morokuma, D.K. Malick, A.D. Rabuck, K. Raghavachari, J. B. Foresman, J. Cioslowski, J.V. Ortiz, B.B. Stefanov, G. Liu, A. Liashenko, P. Piskorz, I. Komaromi, R. Gomperts, R. L. Martin, D.J. Fox, T. Keith, M.A. Al−Laham, C.Y. Peng, A. Nanayakkara, C. Gonzalez, M. Challacombe, P.M.W. Gill, B. Johnson, W. Chen, M.W. Wong, J.L. Andres, C. Gonzalez, M. Head−Gordon, E.S. Replogle, and J.A. Pople, Gaussian, Inc., Pittsburgh PA, 1998.
M. Karplus, J. Chem. Phys., 30, 11 (1959).
K. Ute, T. Nishimura, Y. Matsuura, and K. Hatada, Polym. J., 21, 231 (1989).
K. Ute, T. Nishimura, and K. Hatada, Polym. J., 21, 1027 (1989).
F. A. Bovey and G. V.D. Tiers, J. Polym. Sci., 44, 173 (1960).
A. Nishioka, H. Watanabe, K. Abe, and Y. Sono, J. Polym. Sci., 48, 241 (1960).
G. J. Ray, R. E. Pauls, J. J. Lewis, and L. B. Rogers, Makromol. Chem., 186, 1135 (1985).
S. Brownstein, S. Bywater, and D. J. Worsfold, Makramol. Chem., 48, 127 (1961).
Y. Sakurada, M. Matsumoto, K. Imai, A. Nishioka, and Y. Kato, J. Polym. Sci., B1, 633 (1963).
K. C. Ramey and G. L. Statton, Makromol. Chem., 85, 287 (1965).
P. A. Berger, J. J. Kotyk, and E. E. Remsen, Macromolecules, 25, 7227 (1992).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Osa, M., Sumida, M., Yoshizaki, T. et al. Determination of Stereochemical Compositions of Oligo- and Poly(α-methylstyrene)s by 1H and 13C NMR. Polym J 32, 361–369 (2000). https://doi.org/10.1295/polymj.32.361
Issue Date:
DOI: https://doi.org/10.1295/polymj.32.361