Flame retardant behavior of nitrogen and phosphorus based polymers and effect of nitrogen and antimony on their flame retardancy

Phosphorus and heterocyclic based epoxy resins have been synthesized as comparatively more flame retardant and thermally stable polymers than commercially available bisphenol-A-epichlorohydrin standard epoxy resin. The effects of nitrogen and antimony on flame retardancy of the phosphorus-based and heterocyclic-based epoxy resin are also reported. At a particular P/N or Sb/N ratio the synergistic effect is maximum.