Anionic Polymerization of 4‑Methacryloyloxy-TEMPO
Using an MMA-Capped Initiator
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Abstract
Anionic polymerization of 4-methacryloyloxy-TEMPO
(TEMPO = 2,2,6,6-tetramethylpiperidin-1-oxyl)
was successfully carried out using methyl methacrylate-capped 1,1-diphenylhexyllithium
(DPHLi/MMA), of which nucleophilicity is moderate enough to suppress
the side reaction between the nitroxide radical of TEMPO moiety and
the carbanion of DPHLi, to yield the radical polymer with well-controlled
molecular weight, narrow polydispersity index (PDI < 1.10), high
yield (>95%), and almost 1.0 radicals per monomer unit