Preparation and Flame Retardancy of Flame Retarded Epoxy Resin/Organic Montmorillonite Nanocomposite

Flame retarded epoxy resin(EP) and EP/organic montmorillonite(OMMT) nanocomposites were prepared using BHAPE as additive flame retardant.It was found that the addition of BHAPE not only EP curing reaction was unaffected,but also expedite solidification of EP.The XRD showed that the layers of OMMT were exfoliated and dispersed in BHAPE/EP/OMMT(nanocomposite).The flame retardant synergism of BHAPE and OMMT was studied by the combination measures of LOI,UL 94,and CONE parameters.Experimental results showed that Limiting oxygen index and UL94V flame retardancy of EP flame retarded with 25%(mass fraction) of BHAPE and 5%(mass fraction) of OMMT reached 31.1% and V-0 grade,respectively.The p-HRR,a-HRR and a-MLR etc CONE parameters were lower than those of pure EP,particularly,p-HRR and a-HRR were 67.6% and 17.3% respectively lower than those of pure EP.Flame retarded properties of nanocomposite were improved because of the synergistic flame retardancy of BHAPE and OMMT in condensed phase.