Abstract
The difunctional polystyryl anion of a definite degree of polymerization was reacted with triphenylmethylbromide to form a polystyryl radical. The ratio kij/k12, where kij is the rate constant of the termination reaction between two polymer radicals (with i and j as the degree of polymerization), and k1 is the rate constant of the termination reaction between a polymer radical and the radical de-activators, was estimated by GPC (gel-permeation chromatography) analysis on the polymer produced from the free radical species formed by the anion—radical transformation reaction. It was found that the ratio kij/k12 increases when the polymer concentration and the value j−1 (j=1, 2, 3) increase. On the contrary, when the polymer concentration decreases, kij/k12 decreases. The results were discussed from the viewpoint of a diffusion-controlled reaction.
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Fukutomi, T., Toyoura, M. & Kakurai, T. A Study of the Termination Reaction Rate of a Polymer Radical of Definite Degree of Polymerization. I. Polystyryl Radical. Polym J 8, 174–180 (1976). https://doi.org/10.1295/polymj.8.174
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DOI: https://doi.org/10.1295/polymj.8.174