Vinyl-substituted monomers radical ring-opening

Figure 3. Typical patterns of radical ring-opening polymerization of exomethylene-sub stttuted and vinyl-substituted cyclic monomers.

Reviews on radical ring-opening polymerization include those by Sanda and Endo, " Klemm and Schultz, Cho, " Moszner e( Endo and Yokozawa Stansbury and Bailey. A review by Colombani on addition-fragmentation processes is also relevant. Monomers used in ring-opening are typically vinyl (e.g. vinylcyclopropane - Scheme 4.20 Section 4.4.2.1) or methylene substituted cyclic compounds (e.g. kctenc acetals - Section 4.4.2.2) where addition to the double bond is followed by p-scis.sion. 

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