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Visible Light-Induced Atom Transfer Radical Polymerization
Ist Teil von
Macromolecular chemistry and physics, 2012-07, Vol.213 (13), p.1391-1396
Ort / Verlag
Weinheim: WILEY-VCH Verlag
Erscheinungsjahr
2012
Link zum Volltext
Quelle
Wiley-Blackwell Journals
Beschreibungen/Notizen
Visible light‐induced reverse and simultaneous reverse and normal initiation (SR&NI) atom transfer radical polymerizations of vinyl monomers are examined using various dyes and type I photoinitiators. The effect of photoinitiator types on the control of molecular weight and distribution is described. In both dye and type I photoinitiator sensitized SR&NI ATRP systems, the molecular weights increase linearly with conversion. However, the experimental molecular weights are considerably higher than the theoretical values and the polymers show broad‐molecular‐weight distributions ranging from 1.28 to 1.60 in the dye‐sensitized SR&NI ATRP. However, the polymers obtained by SR&NI ATRP using type I photoinitiator system had molecular weight values close to the theoretical ones and very narrow‐molecular‐weight distributions ranging from 1.11–1.18.
Visible light‐induced reverse and simultaneous reverse and normal initiation (SR&NI) atom transfer radical polymerizations of vinyl monomers, methyl meth(acrylate)s, and styrene are examined by using various dyes and type I photoinitiators. The polymerizations proceed in a well‐controlled manner under visible light at room temperature as evidenced by kinetic studies.