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FREE RADICAL POLYMERIZATION OF VINYL FERROCENE,
ROHM AND HAAS CO HUNTSVILLE ALA REDSTONE RESEARCH LABS
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The results of quantitative studies of the rates of free radical polymerizations of vinyl ferrocene indicate that the latter has polymerization characteristics similar to those for styrene. The rates of homopolymerization of these two monomers in benzene at 70 C. were measured using azo-bis-isobutyronitrile as the catalyst. Small amounts of vinyl ferrocene and styrene have similar effects on the rates of polymerizations of methyl methacrylate and ethyl acrylate and on the molecular weights of the resulting polymer. Polystyrene and poly vinyl ferrocene with similar molecular weights are isolated from polymerizations carried out under identical conditions. The rates of copolymerization of vinyl ferrocene-methyl methacrylate vinyl ferrocene-styrene, and styrene-methyl methacrylate were determined by following the disappearance of monomers using gas chromatographic analyses. The relative reactivity ratio for vinyl ferrocene is slightly lower than that for styrene. Author
APPROVED FOR PUBLIC RELEASE