Enhanced Thermal and Mechanical Properties of Boron-Modified Phenolic Resin Composites in a Multifiller System: Potential Applications in Aerospace Materials

Abstract

The study investigated the properties of boron-modified phenolic resin (BPR) compositess reinforced with glass fiber (GF) and mica, SiO₂ and glass powder (MSG). The BPR/MSG/GF composites exhibited improved mechanical strength, reduced shrinkage, and enhanced insulation properties at high temperatures. Thermogravimetric analysis showed enhanced thermal stability with a residue rate of 89.91% at 800 ℃. The addition of glass powder which is regarded as a fluxing agent, resulted in the densification of the ceramic layer. X-ray diffraction analysis (XRD) demonstrates that mica undergoes eutectic reaction with other fillers and glass powder to form the final ceramic layer. These findings have implications for the development of high-performance compositess with excellent heat resistance and mechanical strength. Further optimization of filler content and processing conditions can enhance the performance of these composites for specific applications.