Kinetic Evaluation of 9,10-dihydro-9-oxa-10- phosphaphenanthrene-10-oxide as a Flame Retardant for Epoxy Resins

摘要

In this investigation the flame-retardant effect of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on an epoxy resin (EP) was studied. The results showed that the peak of heat release rate (PHRR) and total heat release (THR) of EP/DOPO (FREP) with 5phr DOPO during cone calorimeter measurements were only 67.4% and 75.3% of those of pure EP, respectively. The thermal degradation behavior of FREP was analyzed by the Kissinger and Flynn-Wall-Ozawa methods, both of which indicated that the activation energy of the FREP thermal degradation was lower than that of pure EP. This was attributed to the addition of DOPO into the resin, which promoted the thermal degradation of the EP composite.