Regio-selective peroxybromination of poly(vinyl methyl ketone) as versatile tool for generation active ATRP initiation sites on solid surfaces

Kumru B., Gure B., Bicak N.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.51, no.18, pp.3892-3900, 2013 (SCI-Expanded) identifier identifier


Peroxybromination or so-called radical bromination is an environmentally friendly process which involves the use of in situ generated bromine by action of hydrogen peroxide on sodium or ammonium bromide in acid medium. The reaction takes place at room temperature without eliminating hydrobromic acid and no needs the use of elemental bromine. The reaction with poly(vinyl methyl ketone) in biphasic system was demonstrated to result in quantitative bromination exclusively at the methyne carbon of the polymer. The brominated polymer was successfully used as multifunctional macroinitiator for atom transfer radical polymerization (ATRP) of styrene and MMA to give bottlebrush polymers, as evidenced by H-1 NMR and GPC. This strategy was demonstrated to provide a means of easy bromination of solid polystyrene microspheres (210-420 mu m) constituting with vinyl methyl ketone copolymer segments. Bromoalkyl groups generated (1.3 mmol g(-1)) in aqueous mixture were used for surface initiated ATRP of glycidyl methacrylate and styrene monomers to give dense graft chains tethered to the surfaces with hydrolysis-proof linkages. (C) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 3892-3900