Abstract
The effect of alkyl substituents in the radical copolymerizations of α- and β-alkylstyrenes with acrylonitrile was investigated. For α- and β-methylstyrenes, the radical copolymerizations with methyl acrylate and methacrylonitrile were also carried out. It was shown that when Q and e values are tentativively assigned to these methylstyrenes, the steric effect of the methyl substituent is mainly included in Q values.The relative reactivities within each series of α-alkyl-, cis-β-alkyl-, and trans-β-alkylstyrenes toward the acrylonitrile radical are related to the steric repulsion effect and the hyperconjugation effect of alkyl substituents. Differences in reactivities among these isomer series are attributed to the resonance factor.
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Inaki, Y., Hirose, S., Nozakura, Si. et al. Steric Effects in the Radical Copolymerization of α- and β-Alkylstyrenes. Polym J 3, 159–165 (1972). https://doi.org/10.1295/polymj.3.159
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DOI: https://doi.org/10.1295/polymj.3.159
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