Abstract
Polymerization of p-methoxystyrene by radiation was studied in bulk. Upon drying the monomer, the rate of polymerization, Rp, became greater, changing its dose rate dependence from 0.5 to 1. The molecular weight distribution of the obtained polymers failed to give a bimodal curve; however, the peak molecular weight increased with higher Rp. These kinetic features can be explained by a coexistence of radical and cationic mechanisms, as has been established in styrene, though there remain ambiguities about the effects of additives. Copolymerizations with styrene and 2-chloroethyl vinyl ether also showed a cationic nature for the reaction. A survey of possibilities of ionic polymerization by radiation was also carried out in ten ring-substituted styrene derivatives.
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Hayashi, K., Pepper, D. Ionic Polymerization of p-Methoxystyrene and Other Styrene Derivatives by Radiation. Polym J 8, 1–9 (1976). https://doi.org/10.1295/polymj.8.1
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DOI: https://doi.org/10.1295/polymj.8.1
