Abstract
A formula for testing the existence of the penultimate effect in stereospecific polymerization can be improved upon to read ΔεP=−kTln {IS/(i−I)(s−S)} by considering the contribution made by statistical non-stationarity in the propagating step. This formula is applied to cases in the polymerization of methyl methacrylate initiated by n-butyllithium. The linearity of the plots of ΔεP against polymerization temperature is improved in comparison with plots using the original formula. The formulae for testing the existence of prepenultimate effects are also improved. The measures for estimating penultimate and prepenultimate effects and for the contribution made by statistical non-stationarity are also compared.
Similar content being viewed by others
Article PDF
References
R. Chûjô, J. Phys. Soc. Jpn., 21, 2669 (1966).
Y. Ohsumi, T. Higashimura, and S. Okamura, J. Polym. Sci., Part A-1, 5, 849 (1967).
R. Chûjô, Makromol. Chem., 107, 142 (1967).
A. Zambelli, A. L. Segre, M. Farina, and G. Natta, Makromol. Chem., 110, 1 (1967).
J. Furukawa, Kobunshi (High Polymers, Japan), 16, 520 (1967).
F. A. Bovey, J. Polym. Sci., 46, 59 (1960).
R. Chûjô, Rep. Prog. Polym. Phys. Jpn., 11, 449 (1968).
Y. Ohsumi, T. Higashimura, S. Okamura, R. Chûjô, and T. Kuroda, J. Polym. Sci., Part A-1, 6, 3015 (1968).
M. Maruhashi and H. Takita, Makromol. Chem., 124, 172 (1969).
R. Chûjô and T. Kuroda, Polym. J., 1, 204 (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chûjô, R. Contribution of Statistical Non-Stationarity in Testing of Existence of Penultimate and Prepenultimate Effects in Stereospecific Polymerization. Polym J 1, 222–225 (1970). https://doi.org/10.1295/polymj.1.222
Issue Date:
DOI: https://doi.org/10.1295/polymj.1.222