Abstract
AbstractThe free radical polymerization of methyl methacrylate initiated by the hexakis (arylisocyano)chromium(0)‐CCl4 system has been studied for a number of derivatives in which both chlorine and methyl groups have been introduced into the benzene ring. It has been found that single substituents in the benzene ring, irrespective of position, have little effect on the activity of the system other than that which can be explained by the electronic effects of these substituents. However, where steric overcrowding occurs it has been shown that the rate of initiation is reduced considerably. This confirms the established mechanism of initiation for this type of derivative.
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