“…Some progress was made with filler nanoparticles such as organically modified layered-silicate clay minerals referred to as organoclays or nanoclays [4,5], extended carbon nanostructures [5,6], layered double hydroxides [7], polyhedral oligomeric silsesquioxanes [8], and oxide ceramic nanoparticles [9] to achieve synergistic improvements in flame retardancy of polymers filled with halogen-free flameretardants. However, no synergism or even strong anti-synergism was encountered in many cases [9e13].…”