In the curing reaction processing of BOZ-A/vermiculite nanocomposites intercalated with polybenzoxazine (bisphenol A type) precursor (BOZ-A)

the acidic onium poton on the organophilic vermiculite surface has not emerged catalytic effect on the ring-opening polymerization of BOZ-A．It may be indicated that different retarding effects took place while different kinds of dispersed status(“intercalation”and/or“exfoliation”) of vermiculite layers were forming

which were correlative with the content of vermiculite in resin matrix As the content ol vermiculite is about 3 wt％

the curing retardance is serious

compared with that of pristine BOZ-A

the i>tgel and the curing activation energy (Ea) of BOZ-A in the nanocomposites increased 7min and 8 kJ/mol

respectively

and the curing enthalpy (△Hd) decreased by 14J/g．As a result

the cure-degree of rsin decreased by 7％～10％．With the increase of vermicalite content

the curing retardance becomes not obvious．