Cobalt-Mediated Radical Polymerization of Vinyl Acetate in Miniemulsion: Very Fast Formation of Stable Poly(vinyl acetate) Latexes at Low Temperature
✍ Scribed by Christophe Detrembleur; Antoine Debuigne; Rayna Bryaskova; Bernadette Charleux; Robert Jérôme
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 122 KB
- Volume
- 27
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
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 imageSEC chromatograms for the PVAc–Co(acac)~2~ macroinitiator and PVAc latex obtained under ultrasonication for 6 min at 0 °C (79% monomer conversion).