Abstract
The mechanism of stereospecific polymerization in a methyl methacrylate–Grignard reagent (C6H5MgBr) system is studied as a function of polymerization temperature with high-resolution nuclear magnetic resonance (NMR) spectroscopy for obtained polymers. It is found that the maximum temperature during the reaction in our experiments is appropriate for adoption as the polymerization temperature rather than the commonly used setting temperature.As a result it is found that the mechanism is different at temperatures higher and lower than about 266°K. Also, the NMR spectra of C6H5MgBr in a deuterated toluene-d8 are measured over a wide range of temperatures and remarkable change is observed in the vicinity of about 266°K. It may reflect the above difference in polymerization mechanisms on both sides of about 266°K.
Similar content being viewed by others
Log in or create a free account to read this content
Gain free access to this article, as well as selected content from this journal and more on nature.com
or
References
R. Chûjô, J. Phys. Soc. Jpn., 21, 2669 (1966).
A. Nishioka, H. Watanabe, K. Abe, and Y. Sono, J. Polym. Sci., 48, 241 (1940).
Y. Kato, H. Watanabe, and A. Nishioka, Bull. Chem. Soc. Jpn., 37, 1630 (1964).
M. S. Kharasch and O. Reinmuth, "Grignard Reagents of Nonmetallic Substances," Prentice-Hall, Inc., New, N. Y. 1954.
D. F. Evans and J. P. Maher, J. Chem. Soc., 5152 (1962).
D. F. Evans and M. S. Khan, Chem. Commun., 3, 67 (1966).
H. Kawabata and J. Furukawa, Kogyo Kagaku Zasshi (J. Chem. Soc. Japan, Chem. Ind. Sect.), 70, 1423 (1967).
A. Weissberger and E. S. Proskauer, "Organic Solvents," Interscience Pub., Inc., New York, N. Y., 1954.
J. Furukawa, T. Tsuruta, T. Fueno, S. Inoue, N. Kawabata, K. Onishi, and T. Saegusa, Kogyo Kagaku Zasshi (J. Chem. Soc. Japan, Chem. Ind. Sect.), 61, 723 (1958).
J. Furukawa, Kobunshi (High Polymers), 16, 520 (1967).
H. Spiesecke and W. G. Schneider, J. Chem. Phys., 35, 731 (1961).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ando, I., Chûjô, R. & Nishioka, A. Polymerization Mechanism in Methyl Methacrylate–Grignard Reagent System. I. Phenylmagnesium Bromide. Polym J 1, 609–615 (1970). https://doi.org/10.1295/polymj.1.609
Issue date:
DOI: https://doi.org/10.1295/polymj.1.609
