Bismaleimides blend with a synthesised phosphorus-containing benzoxazine and its mechanical and tribological properties

The phosphorus-containing benzoxazine-bismaleimides (PBOZ-BMI) resin was fabricated by blending the synthesised phosphorus-contained benzoxazine monomer (PBOZ) with bismaleimides (BMI). The influence of PBOZ content on the mechanical and tribological properties of PBOZ-BMI resin was researched. The results showed that suitable addition of PBOZ can enhance the mechanical properties and decrease the frictional coefficient and wear rate of PBOZ-BMI resin to some extent. The improvement of mechanical properties of PBOZ-BMI can be attributed to the cross hydrogen bonding and network interpenetrating. The wear mechanism of the PBOZ-BMI resin was converted from fatigue wear to adhesive wear after the addition of PBOZ, observed from the wear surface of the materials by scanning electron microscopy (SEM). The enhancement of tribological properties is due to the high heat resistance of PBOZ, which can inhibit the adhesive wear during the wear effective.