Semi–interpenetrating networks based on epoxy resin and oligophosphonate: Comparative effect of three hardeners on the thermal and fire properties

Traditional materials are being constantly replaced by synthetic polymers, most of which highly flammable. Epoxy resins versatile and among the important class due to their multiple crosslinking capacity endowed oxirane ring, applications ranging from adhesives aeronautics. This study investigates comparative effect three hardeners (aromatic, cycloaliphatic, aliphatic) addition an oligophosphonate on thermal behavior fire performance bisphenol A diglycidyl ether semi–interpenetrating polymer networks. Networks with epoxy resin 2% phosphorus loading were prepared. Evolved gases analyses, experiments used propose action mode in enhancement resin. Non–isothermal decomposition kinetics studies conducted. The promoted a significant reduction peak heat release rate values (33 55%) microscale combustion calorimeter experiments. UL 94–V0 classification was achieved for network aromatic curing agent. obtained results recommend cured hardener as potential matrix flame retardant composites or coatings.