Flame retardancy and physical properties of poly (vinyl alcohol) chemically modified by urea condensate compounds

A novel flame retardant poly (vinyl alcohol)/urea condensate has been prepared using solvent blending. Urea condensate compositions consist of urea, sulfamic and phosphorus acids were prepared via melting process in various molar ratios. The water soluble urea condensate materials were applied to an aqueous polyvinyl alcohol solution (10%) in different concentrations. The FT-IR and Raman spectrum of the modified polymer were studied. The elasticity of the polymer has been improved; the elongation at yield for the modified polymer was indicated 5 times higher than the original sample. The thermal decomposition of this flame retardant polymer was also investigated using DSC and TGA. The effect of urea condensate materials as a flame retardant to PVA has been confirmed entirely using LOI (Limited Oxygen Index) test