Kinetics of curing reaction of benzoxazine precursors based on diphenyl oxide resin

In the presence of different kinds of catalysts and at dif fe rent heating rates,the kinetics and kinetic parameters of the curing reaction of benzoxazine precursors based on diphenyl oxide resin was investigated by DSC.Th e results showed that it is very great that effect of catalysts and heating rate s on the temperature of starting to polymerize and curing enthalpy of the precur sor.The reactive energy of thermal curing reaction is 119.6 kJ.mol -1 .The r eaction order of thermal polymerization approaches 1.