Abstract
The functionalization of a carbon black surface with atom transfer radical polymerization (ATRP) initiating sites and subsequent ATRP of n-butyl acrylate (n-BA) from the surface of carbon black is reported. The polymerizations were carried out using CuBr/N,N,N‘,N‘,N‘ ‘-pentamethyldiethylenetriamine and CuBr2/4,4‘-di(5-nonyl)-2,2‘-bipyridine as the catalytic system at 70 °C. A significant amount of polymers was attached to the carbon black as determined by thermogravimetric analysis and light scattering experiments. The molecular weights of the polymers grafted on carbon black were determined by detachment experiments and measured by gel permeation chromatography. The presence of dense poly(n-BA) brushes around carbon black aggregates was confirmed by atomic force microscopy. The resulting poly(n-BA)-bound carbon blacks formed stable dispersions in organic solvents for poly(n-BA).
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