Preparation And Properties Of OTAC-MMT/PES-MBAE Composite Material

Bismaleimide(BMI)has good processability,thermostability and insulativity.but its cured productshas have many disadvantages such as big brittleness and bad shock resistance which limit the application of BMI in aerospace and industry production.Organic montmorillonite and thermoplastic resin polyether sulfone(PES)were used to toughen BMI in this paper,in order to improve the toughness of BMI resin significantly and avoid decreased other properties of composite meanwhile.The organic effects of octadecyl trimethylammonium chloride(OTAC)and polyether amine(POP)organic reagents on sodium montmorillonite(na-mmt)were comparative studied.Diallyl bisphenol A(BBA)and bisphenol A diene propyl ether(own empowerment)as reactive diluent,which reacted with 4,4 ’-diamino diphenyl methane bismaleimide(BMI)to synthesizing MBAE matrix resin.organic montmorillonite(OMMT)and polyether sulfone(PES)were added into MBAE matrix,as modifier and OTAC-MMT/PES-MBAE composite was prepared.Montmorillonite(MMT)was characterized and analyzed by FTIR,XRD,SEM,muffle test and TG.The results showed that the interlayers of modified MMT increased,especially that of OTAC-MMT,which increased 0.69nm;The laminar structure was more obvious and the agglomeration was weakened;the thermal decomposition temperature of OTAC-MMT was 200℃;The OTAC-MMT had the lowest polarity and the compatibility with organic was best.The chemical structures and microstructures of composites were investigated by FT-IR and SEM.The heat resistance,dielectric properties and mechanical properties of composite were tested.The mechanical properties of OTAC-MMT/MBAE composite were the best,the thermal decomposition temperature was 443.79 ℃,which was 14.41 higher than ℃that of MBAE.The dielectric constant and dielectric was lowest,when the content of PES was 3 wt%,The mechanical properties of OTAC-MMT/PES-MBAE composite were the best,the impact strength and bending strength were 15.88 k J/mm2 and 151.41 MPa.The dielectric constant and loss of the composite material showed a little increase while OTAC-MMT and PES exist,but both as modifier,the dielectric properties of the materials were better.