Abstract
Anthracene-photosensitized cationic polymerization of cyclohexene oxide at λ=350 nm in conjuction with onium salts, namely N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP +PF 6 −) or diphenyliodonium hexafluorophosphate (Ph 2I +PF 6 −), in the presence of a stable radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), yielded polymers with alkoxyamine terminal groups. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. IR, 1H-NMR spectral analysis and GPC studies of the obtained polymers show that block copolymers are readily formed as a result of combination of photosensitized cationic and stable free radical polymerization mechanisms.
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