How do nano-fillers affect thermal stability and flame retardancy of intumescent flame retarded polypropylene
writer：Du BX, Ma HY, Fang ZP*
keywords：Flammability, Intumescent flame retardants, Nanocomposite
source：期刊
specific source：Polym. Advan. Technol., 2011.7, 22(7): 1139-1146
Issue time：2011年
Recent advances in ?ame retardant polymers have centered on the ?ame retardancy of nano-fillers contained polymer nanocomposites. Among which, organo-clay (OMMT), layered double hydroxides (LDH), polyhedral oligomeric silsesquioxane (POSS) and carbon nanotubes (CNTs) have been reported and proved to be effective flame retardants for variable polymers. In this paper, a systematical study was executed on flame retarded polypropylene composites containing intumescent flame retardant (IFR) and the most popular nano-fillers. Dispersion of the nano-fillers was characterized by using transmission electron microscopy (TEM), the results revealed that all nano-fillers dispersed homogeneously in PP matrix. The effects of nano-fillers on thermal stability and flammable of polypropylene were investigated by thermogravimetry (TG) and cone calorimetry tests, respectively. The results indicated that different nano-fillers played different roles in thermal and flammability properties of composites. Polypropylene composites with OMMT gave the best reductions in heat release rate (PHRR) and endowed polypropylene with relatively better flame retardancy.