title: Photochemically Induced ATRP of (Meth)Acrylates in the Presence of Air: The Effect of Light Intensity, Ligand, and Oxygen Concentration.
abstract: Well-defined poly(methyl methacrylate) (PMMA) and poly(methyl acrylate) (PMA) are prepared via photochemically induced atom transfer radical polymerization (photoATRP) using ppm amounts of CuBr2/tris(2-pyridylmethyl)amine and CuBr2/tris[2-(dimethylamino)ethyl]amine catalyst complexes, respectively, without degassing of polymerization mixture and with no need to introduce an external reducing agent to the system. The effect of ligand to CuBr2ratio on kinetic and induction period during the polymerization of MMA and MA is investigated. The induction period is influenced also by the amount of oxygen in the polymerization system. Both the kinetics of MA polymerization and the induction period are affected by light intensity. Finally, the high livingness and initiation efficiency of the photoATRP system in the presence of air are proved by chain extension polymerizations. The presented system is valuable from an industrial point of view, since after optimization, well-defined and high-molar-mass poly(meth)acrylates can be prepared without the necessity of degassing the system, while the polymerization can be proceeded quickly and without an induction period.
authors.affiliation: Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, 845 41, Slovakia.
authors.forename: Katarína
authors.initials: K
authors.lastname: Borská
authors.affiliation: Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, 845 41, Slovakia.
authors.forename: Daniela
authors.initials: D
authors.lastname: Moravčíková
authors.affiliation: Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, 845 41, Slovakia.
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Mosnáček
mesh_terms: D002384:Catalysis; D007700:Kinetics; D008689:Methacrylates / Q000138:chemical synthesis* / Q000528:radiation effects; D010100:Oxygen / Q000737:chemistry*; D010777:Photochemistry; D058105:Polymerization
chemical_list: D008689:Methacrylates; D010100:Oxygen
keywords: atom transfer radical polymerization (ATRP); controlled architecture; light; oxygen tolerance; photopolymerization