Visible light-activated polymerization using an easily synthesized dibromidecompound

In situ, bromination of vinyl monomers, such as styrene and acrylamide, using tetra-n-butylammonium tribromide exposure of the resulting dibromide compounds to visible LED light (۴۰۰ nm)causes photocleavage of the C-Br bonds to generate radicals and initiate polymerization. Thisapproach successfully synthesized polystyrene, polyacrylamide, and related random and blockcopolymers. GPC analysis revealed the dibromide-initiated polymers had relatively narrow molecularweight distributions, comparable to those obtained using ATRP, photo-ATRP, and metal-free photo-ATRP techniques. This visible light-induced polymerization's simplicity, the ease of dibromideinitiator preparation, and the controlled molecular weights make it a promising alternative totraditional radical polymerization methods.

کلیدواژه ها:

copolymers ، tetra-n-butyl ammonium tribromide ، visible light ، photopolymerization