Tribological properties of bismaleimide reinforced with Si-containing benzoxazine monomer

Abstract

To improve the mechanical and tribological properties of bismaleimide (BMI) resin, a novel Si-containing benzoxazine (Si-BOZ) monomer was synthesized using a solvent process and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane as a silane coupling agent. The novel Si-BOZ monomer was subsequently blended with BMI to prepare Si-BOZ/BMI polymer alloys. Furthermore, the effect of Si-BOZ content on the mechanical, tribological, and thermal properties of Si-BOZ/BMI alloys was investigated. The results revealed that the addition of Si-BOZ to BMI improved the mechanical properties and wear resistance of Si-BOZ/BMI; moreover, the glass transition temperature of cured Si-BOZ/BMI alloys was lower than that of pure BMI resin. These results confirmed that the increase in wear resistance of Si-BOZ/BMI alloys can be attributed to the increase in thermal resistance and improvement in mechanical performance owing to the addition of Si-BOZ.

Two high toughness and flame retardant DOPO-containing polybenzoxazines based on polyether-urea

“…5 PBzs are versatile resins with distinct chemical structure and properties, in terms of excellent mechanical performance, high flame and chemical resistance, thermal stability, near-zero volumetric shrinkage upon curing, low water absorption and excellent resistance to chemicals. [6][7][8][9][10] Especially, the last merit of molecular design flexibility has attracted wide attention in the field of high-performance polymers, and numerous desired benzoxazines were synthesized to improve the material properties of PBz resin. 11,12 The significant advantages of PBz meet a variety of application scenarios and ensure their application in harsh environments.…”