Graft copolymerization of vinyl monomers on modified cottons XV. Initiation by decomposition of aryl diazonium groups

Abstract

AbstractCellulose bearing aromatic amino groups was prepared by reacting cellulose with 2,4‐dichloro‐6‐(p‐nitroaniline)‐s‐triazine in presence of alkali followed by subsequent reduction of the nitro groups to amino groups. The latter were diazotized and grafting was achieved without homopolymer contamination through decomposition of the cellulose diazonium salt under the effect of metal ions. The dependence of grafting on the nature of the monomers was governed by the pH of the polymerization medium, reaction temperature and concentration of emulsifier. Using a large liquor ratio decreased the graft yield. The cellulose macroradical formed via decomposition of the diazo group was found very effective in inducting methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, butyl methacrylate, isopentyl methacrylate, acrylamide and 2‐methyl‐5‐vinyl pyridine.