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- W2265147219 abstract "Photoinduced electron transfer–reversible addition–fragmentation chain transfer (PET-RAFT) polymerization was employed for the polymerization of unconjugated monomers, including vinyl acetate, vinyl pivalate, N-vinylpyrrolidinone, dimethyl vinylphosphonate, vinyl benzoate, and N-vinylcarbazole, in the presence of low concentration (ppm range) of photoredox catalyst, fac-[Ir(ppy)3], under low energy visible light irradiation. Kinetic studies of vinyl acetate indicated excellent control of molecular weights and molecular weight distributions (Mw/Mn = 1.09–1.2), even with high monomer conversion (>75%), in different catalyst concentrations. High molecular weights of poly(vinyl acetate) (Mn > 100 000 g/mol) and poly(N-vinylpyrrolidinone) (Mn > 40 000 g/mol) with low dispersities (Mw/Mn < 1.25) were obtained in bulk polymerizations. Moreover, the online kinetic study using Fourier transform near-infrared (FTNIR) showed comparable kinetic rates for the polymerizations in the absence and presence of relatively large amount of air, which demonstrates that the PET-RAFT technique possesses the ability of tolerance toward oxygen. Successful chain extensions of homopolymers of poly(vinyl acetate) and poly(N-vinylpyrrolidinone) to vinyl acetate and vinyl pivalate confirmed their integrities of end-group S–(S═Z)–O." @default.
- W2265147219 created "2016-06-24" @default.
- W2265147219 creator A5001395511 @default.
- W2265147219 creator A5034272377 @default.
- W2265147219 creator A5041558999 @default.
- W2265147219 date "2014-07-17" @default.
- W2265147219 modified "2023-10-06" @default.
- W2265147219 title "Photoinduced Electron Transfer–Reversible Addition–Fragmentation Chain Transfer (PET-RAFT) Polymerization of Vinyl Acetate and <i>N</i>-Vinylpyrrolidinone: Kinetic and Oxygen Tolerance Study" @default.
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- W2265147219 doi "https://doi.org/10.1021/ma500842u" @default.
- W2265147219 hasPublicationYear "2014" @default.
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