Abstract
The tris(π-allyl)chromium—pyridine system was found to be a good catalyst for the polymerization of MMA with quantitative yield. The kinetics and the mechanism of the polymerization were studied dilatometrically and gravimetrically at 0°C. Analysis of the data on the molecular weight of PMMA and of kinetic data showed that the initiation reaction was relatively fast and the termination reaction was negligible. The propagation rate constant was about 1.7 M−1 sec−1. The copolymerization of MMA with styrene (1:1) resulted in homopolymerization of MMA. This indicates that the mechanism is of an anionic type. The activating effect of pyridine taken in great excess with respect to the chromium compound (800: 1) excludes the possibility of the coordinate-anionic mechanism of the polymerization of MMA.
Similar content being viewed by others
Article PDF
References
D. G. H. Ballard, W. H. Janes, and T. Medinger, J. Chem. Soc., Sect. B, 1168 (1968).
D. G. H. Ballard and T. Medinger, J. Chem. Soc., Sect. B, 1177 (1968).
D. G. H. Ballard and J. V. Dawkins, Makromol. Chem., 148, 195 (1971).
“Methoden der organischen Chemie,” Vol. II, Houben-Weyl, 1953, p 324.
T. G Fox, J. B. Kinsinger, H. F. Mason, and E. M. Schuele, Polymer, 3, 71 (1962).
M. Szwarc, “Carbanions, Living Polymers and Electron Transfer Processes”, Inter science, New York, N.Y., 1968.
B. L. Erussalimsky, “Ionic Polymerization of Polar Monomers” (in Russian), Nauka, Leningrad, 1970.
D. G. H. Ballard, Adv. Catal., 23, 263 (1973).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shirokov, N., Mazurek, V. Polymerization of Methyl Methacrylate with Tris(π-allyl)chromium—Pyridine System. Polym J 7, 523–528 (1975). https://doi.org/10.1295/polymj.7.523
Issue Date:
DOI: https://doi.org/10.1295/polymj.7.523
Keywords
This article is cited by
-
Tris-(π-allyl)-chromium-2,2′-dipyridyl system as catalyst for the polymerization of acrylonitrile
Reaction Kinetics and Catalysis Letters (1983)
-
Nature and specificity of active centers in the tris(π-allyl)chromium-pyridine-acrylonitrile system
Reaction Kinetics and Catalysis Letters (1980)