Bis(formylphenolato)cobalt(II)-Mediated Alternating Radical Copolymerization of tert-Butyl 2-Trifluoromethylacrylate with Vinyl Acetate.
作者： Sanjib Banerjee , Ekaterina V Bellan , Florence Gayet , Antoine Debuigne , Christophe Detrembleur
DOI: 10.3390/POLYM9120702
关键词: Monomer 、 Vinyl acetate 、 Coordination sphere 、 Salicylaldehyde 、 Cobalt 、 Copolymer 、 Polymer chemistry 、 Radical polymerization 、 Chemistry 、 Catalytic chain transfer
摘要: The organometallic-mediated radical polymerization (OMRP) of vinyl acetate (VAc) and its OMR copolymerization (OMRcoP) with tert-butyl 2-trifluoromethylacrylate (MAF-TBE) mediated by Co(SAL)2 (SAL = 2-formylphenolato or deprotonated salicylaldehyde) produced relatively well-defined PVAc poly(VAc-alt-MAF-TBE) copolymers at moderate temperature (<40 °C) in bulk. resulting alternating copolymer was characterized 1H-, 13C- 19F-nuclear magnetic resonance (NMR) spectroscopies, size exclusion chromatography. linear first-order kinetic plot, the evolutions molar mass total monomer conversion, low dispersity (Đ~1.55) suggest that this cobalt complex provides some degree control over VAc MAF-TBE. Compared to previously investigated OMRP mediators having a fully oxygen-based first coordination sphere, study emphasizes few peculiarities Co(SAL)2: lower ability trap chains as compared Co(acac)2 absence catalytic chain transfer reactions, which dominates polymerizations carried presence 9-oxyphenalenone derivative.
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