Abstract
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 and poly(VAc-alt-MAF-TBE) copolymers at moderate temperature (<40 °C) in bulk. The resulting alternating copolymer was characterized by 1H-, 13C- and 19F-nuclear magnetic resonance (NMR) spectroscopies, and by size exclusion chromatography. The linear first-order kinetic plot, the linear evolutions of the molar mass with total monomer conversion, and the relatively low dispersity (Đ~1.55) of the resulting copolymers suggest that this cobalt complex provides some degree of control over the copolymerization of VAc and MAF-TBE. Compared to the previously investigated cobalt complex OMRP mediators having a fully oxygen-based first coordination sphere, this study emphasizes a few peculiarities of Co(SAL)2: a lower ability to trap radical chains as compared to Co(acac)2 and the absence of catalytic chain transfer reactions, which dominates polymerizations carried in the presence of 9-oxyphenalenone cobalt derivative.
Highlights
Fluoropolymers are unique materials, exhibiting outstanding properties, suitable for high-value added applications [1,2]
The deuterated solvents used for nuclear magnetic resonance (NMR) spectroscopy THF-d8, acetone-d6 and CDCl3 were purchased from Euroiso-top (Grenoble, France)
The cobalt complex 3 was prepared according to the published procedure [32,33]
Summary
Fluoropolymers are unique materials, exhibiting outstanding properties, suitable for high-value added applications [1,2]. Extensive research and development of different reversible deactivation radical polymerization (RDRP) techniques over the last two decades has enabled the facile synthesis of macromolecules with a high degree of complexity and well-defined architectures [4,5]. Reversible addition-fragmentation chain transfer (RAFT) polymerization [11,12,13,14,15] have been comparatively more studied, organometallic-mediated radical polymerization (OMRP) [16,17,18,19,20] has Polymers 2017, 9, 702; doi:10.3390/polym9120702 www.mdpi.com/journal/polymers polymerization [11,12,13,14,15] have been comparatively more studied, organometallic-mediated radical polymerization (OMRP) [16,17,18,19,20] has recently emerged as a potent RDRP technique for the polymerization ofas“less activated (LAMs), such as vinylofimidazolium salts [21,22] or recently emerged a potent RDRPmonomers”.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
