Abstract
FERRIC chloride in dimethylformamide solution is known to be a retarder for a number of vinyl polymerizations1, the retardation being due to the following reaction: 
where Rṅ represents a growing polymer radical. This effect has been used for measuring the rates of initiation in vinyl polymerizations initiated with 1.1′azo-bis-isobutyronitrile at raised temperatures, the rate of initiation being equal to the rate of formation of ferrous iron. The rate constants for reaction (1) for several different monomers have also been obtained from these kinetic studies.
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References
Bamford, Jenkins and Johnston, Proc. Roy. Soc., A, 239, 214 (1957); Trans. Farad. Soc., 55, 418 (1959); 58, 1212 (1962).
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BENGOUGH, W., MACINTOSH, S. & ROSS, I. Ferric Chloride as Photo-initiator and Terminator in Vinyl Polymerization. Nature 200, 567–568 (1963). https://doi.org/10.1038/200567a0
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DOI: https://doi.org/10.1038/200567a0
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