Summary: Poly(vinyl acetate) macroinitiators end‐capped by a Co(acac) 2 complex (PVAc–Co(acac) 2 ), prepared in bulk by cobalt‐mediated radical polymerization (CMRP), are used for the controlled radical polymerization of vinyl acetate in miniemulsion to give high‐molecular‐weight polymers and high monomer conversion. Stable poly(vinyl acetate) latexes with solid contents ranging from 25 to 30 wt.‐% are prepared within unusually short reaction times (∼1 h) at low temperatures (0–30 °C). SEC chromatograms for the PVAc–Co(acac) 2 macroinitiator and PVAc latex obtained under ultrasonication for 6 min at 0 °C (79% monomer conversion). magnified image SEC chromatograms for the PVAc–Co(acac) 2 macroinitiator and PVAc latex obtained under ultrasonication for 6 min at 0 °C (79% monomer conversion).
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Detrembleur et al. (2005) studied this question.
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