Development of Flame Retardants for Polyester/Cotton Blends.

摘要

Initial studies were carried out to determine the flame retardant characteristics of the individual polyester and cotton fibers. Since previous studies had dealt primarily with cotton and other cellulosic materials,emphasis was placed on the polyester. Structural and chemical factors affecting flammability were determined and evaluated. The interaction of the fibers was studied in both the presence and absence of flame retardants. Several specific types of phosphorus and bromine-containing materials were evaluated to determine their relative retardant efficiencies. Various methods of fixing flame retardants onto polyester were also studied with particular emphasis placed on radiation grafting techniques. Based on the results of these studies several series of model flame retardant treatments were prepared and evaluated on 50/50blend fabrics. The results of these studies were then used as the basis for designing new flame retardant systems having a potential for commercial application. These systems include phosphonium oligomers, a bromine-containing phosphazene and brominated aromatics with a brominated acrylate binder.