Tribological properties of bismaleimide alloy blend with a novel silicon dioxide-containing benzoxazine-monomer

Abstract

To overcome the limited tribological properties of bismaleimide (BMI) resin, a kind of novel organic-inorganic hybrid silicon dioxide nanoparticles with terminal functional amidogen groups (SiO 2 -NH 2 ) was prepared via a sol-gel process. The SiO 2 -NH 2 was chosen as raw materials to react with polyformaldehyde and aniline, and the silicon dioxide-containing benzoxazine-monomer (SiO 2 -BOZ) can be obtained via a solvent process. The new prepared SiO 2 -BOZ were then as modified phase to modify BMI to prepare the SiO 2 -BOZ/BMI composites. With 15.0 wt-% SiO 2 -BOZ, the flexural strength and impact strength of SiO 2 -BOZ/BMI composites can reached the maximum value of 166.12 MPa and 17.93 kJ m −2 , respectively, while the wear rate of SiO 2 -BOZ/BMI composites is only 3.9 × 10 −6 mm 3 N −1 m −1 . The enhanced tribological properties of SiO 2 -BOZ/BMI can be attributed to the improvement of its heat resistance and mechanical properties, which can increase the capacity of the SiO 2 -BOZ/BMI to withstand external forces and heat during the friction process.

Synthesis, polymerization kinetics, and thermal properties of novel bismaleimides containing twisted structure

“…Since benzoxazine resin has many advantages, it is used to modify BMI resin. [29][30][31][32][33] The blending modification tends to appear in the micro split phase, which adversely affects the performance of the blend system. Therefore, introducing it in a suitable structural position of BMI is an important approach in the preparation of stable BMI.…”

“…These reported BMI monomers have enhanced thermal stability and solubility. Since benzoxazine resin has many advantages, it is used to modify BMI resin 29–33 . The blending modification tends to appear in the micro split phase, which adversely affects the performance of the blend system.…”