TY  - EJOU
AU  - He, Mingyan 
AU  - Fu, Jiayu 
AU  - Guo, Fangyu 
AU  - Jiang, Dawei 
AU  - Yang, Ting 
AU  - Xu, Miaojun 
AU  - Wu, Zijian 
AU  - Li, Bin 

TI  - Study on the Thermo-Mechanical Properties of Boron Phenolic Resin Composites Enhanced by Silicone Resin Modification and Multiple Ceramic Fillers
T2  - Journal of Polymer Materials

PY  - 2026
VL  - 43
IS  - 1
SN  - 0976-3449

AB  - Phenolic resins are widely used in thermal protection, yet achieving simultaneous improvement in thermal stability and mechanical strength remains challenging. In this work, a vinyl-modified silicone resin (VMTQ) was synthesized and incorporated into a boron phenolic resin (BPF) matrix. Three composite ceramic fillers, Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–ZrO<sub>2</sub> (ASZ), Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–TiO<sub>2</sub> (AST), and Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–MgO (ASM), were further introduced to construct a multi-oxide synergistic reinforcement system. Thermogravimetric analysis shows that the maximum decomposition rate decreases by 0.2–0.3%·min<sup>−1</sup>, while the ASM/V3/BPF-3 composite exhibits a 74.53% increase in char yield at 800°C and a 163.3°C increase in initial decomposition temperature, confirming its significantly enhanced thermal stability. SEM/EDS and XRD analyses reveal that ASZ, AST, and ASM promote the formation of stable ceramic phases, with ASM generating the densest MgO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> composite oxide layer. Mechanical testing demonstrates that ASZ improves vertical impact strength by 23.9%, AST increases parallel impact strength by 14.1%, and ASM enhances bending strength by 34.5% (316.8 MPa). These results clearly indicate that the combination of VMTQ modification with multi-oxide ceramic fillers can effectively elevate both the thermal stability and mechanical performance of BPF-based composites, providing a practical pathway for designing high-performance resins for demanding thermal-environment applications.
KW  - Ceramic packing; silicone resin; high temperature resistance

DO  - 10.32604/jpm.2026.075379