Combustion behavior and thermal degradation of epoxy resin with caged bicyclic phosphate containing curing agent

摘要

In the present work,caged bicyclic phosphate structure was combined into epoxy resin molecular to obtain halogen-free flame retardant polymers.LOI,UL-94 test,CONE,TG and FTIR etc.methods were used to characterize the flammability,combustion behavior and thermal degradation proerties.The results show that the incorporation of caged bicyclic phosphate structure into the epoxy thermosetting structure can improve both the flame retardancy and thermal stability.Besides,the toxic gases and smoke generated during the combustion process are obviously reduced.The caged bicyclic phosphate 1-oxo-4-hydroxymethyl-2,6,7-trioxa-1-phosphabicyclo [2.2.2] octane (PEPA) acts not only as a curing agent and an intumescent flame retardant but also as a smoke inhibitor for epoxy resin.PEPA is an excellent environmental friendly flame retardant suitable for many purposes.