Abstract
A study was made of the initiation of polymerization of styrene in dimethylformamide with azoisobutyrodinitrile in the presence of ferric chloride. It was shown that at 70° primary radicals formed by the decomposition of the initiator do not interact with ferric chloride. With an increase in temperature to 90° the rate of this reaction increases considerably. Initiation takes place by addition of primary dimethylcyanomethyl radicals to styrene at the β-carbon atom of the vinyl group with the reduction of ferric to ferrous chloride and addition of the chlorine atom to the α-carbon atom of this group. A system was devised for the interaction of ferric chloride with extended radicals. γ-Dimethylcyano-α-chloropropylbenzene was the product of the initiation of polymerization of styrene.
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