Visible Light-Induced Atom Transfer Radical Polymerization
Visible Light-Induced Atom Transfer Radical Polymerization, M. A. Tasdelen, M. Ciftci, Y. Yagci, Macromol. Chem Phys., 213, 1391-1396 (2012) DOI: 10.1002/macp.201200204
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.