International Journal of Chemical Studies
Vol. 4, Issue 1 (2016)
Thermally stable and flame retardant brominated polyurethanes
Author(s): Bhaumik M Patel, Nirmit N Patel
Abstract: The thermal degradation and fire behaviour of new brominated polyurethanes have been studied by thermogravimetric analysis and by measurement of limiting oxygen index (LOI). It has been shown that the fire retardant incorporated in the prepolymer chain increased LOI. Novel flame retardant polyurethanes was prepared and characterized by FT-IR spectroscopy. Polyurethanes that contained halogen group attached to castor oilwere prepared from brominated castor oil, rosinified phenolic resin and diisocyanate by one-step polymerization. The polymers prepared were characterized by FT-IR, thermogravimetric analysis (TGA) and oxygen index (LOI) measurements. The effect of the different percentage weight ratio of brominated castor oil and rosinified phenolic resin on the thermal behavior of the polyurethane was studied. The results indicated that the glass transition temperature (Tg) of the polyurethane increased with the concentration of resin and brominated castor oil content. The brominated containing polyurethanes exhibited slightly higher temperatures of degradation and higher char yields. Moreover, the LOI of the polyurethanes increased with increasing brominated castor oil content. Also studied was the possible mechanism of the flame retardancy.
Pages: 18-23 | 1151 Views 12 Downloads
How to cite this article:
Bhaumik M Patel, Nirmit N Patel. Thermally stable and flame retardant brominated polyurethanes. Int J Chem Stud 2016;4(1):18-23.