A rotating sector determination of the propagation rate constant for benzyl methacrylate in its radical polymerization

The unusually large propagation rate constant for benzyl methacrylate reported in the previous paper was studied in more detail. The decomposition rate of 2,2′-azoisobutyronitrile in this viscous monomer was somewhat smaller than in ordinary solvents. A regular monomer kinetic order could be realized in butanol and in benzyl butyrate whose viscosities were very similar to that of the monomer. A rotating sector experiment in benzyl butyrate gave k_p = 1410 dm³ mol^?1 s^?1 for this monomer, which was essentially identical with the previous result.