Allyl compounds and polyether sulfone(PES) were used tomodify bismaleimide.Meanwhile

organically montmorillonite(OMMT) was doped to prepare OMMT/PES/BMImulti-phasecomposites. Themicrostructure and mechanical properties

thermal properties and therelationship between them were studied and analyzed. SEM test results showed thatPES resin and OMMT dispersed uniformly in polymer matrix and the interfacebetween the two phases was not clear and the bond was close

external stresswas absorbed

transfered and dissipated effectively

while the content of OMMTwas appropriate

so that the composites exhibited ductile fracture.Mechanical properties of the composites showed that bending strength and impactstrength reached 139.36MPa and 14.77 kJ/mm2

to improve 39.38% and57.96% thanthat of the matrix

respectively

when the content of OMMT is 3%. Thethermal decomposition temperature (Td) of the composite materials decreasedslightly because of PES

but this phenomenon could be remedy by OMMT

Td ofcomposite (3%OMMT/2%PES/BMI) reached 456.76℃and improved 17.68℃than that of the matrix.