Comparative studies of silane coupled e‐glass fiber and e‐glass fiber reinforced bismaleimide‐epoxy hydroxylated BaTiO₃ nanocomposites on the dielectric and mechanical properties

Abstract Silane coupled E‐glass fiber (SC‐EGF) and E‐glass fiber (EGF) reinforced bismaleimide (BMI)‐epoxy‐hydroxylated BaTiO₃ (BTOH) nanocomposites with 1–5 wt% of BTOH nanofiller were fabricated by hand lay‐up method and compression molded. Surface hydroxylation of synthesized BaTiO₃ nanoparticles was carried out using H₂O₂. Both BT and BTOH nanoparticles were characterized by SEM, XRD, and FTIR studies. Among the reinforced nanocomposites, SC‐EGF‐reinforced showed a remarkable increase in mechanical and dielectric properties. The tensile strength of BMI‐epoxy composite increased 1.56 and 3.10 times when loaded with 2 and 3 wt% of BTOH, respectively. Their flexural strength too increased 2.14 and 2.21 times upon 2 and 3 wt% of BTOH loading. BMI‐epoxy‐BTOH nanocomposites with 3 wt% of BTOH showed higher tensile strength, flexural strength, and dielectric strength indicating that it possesses better mechanical and insulating properties and composites with 2 wt% showed higher dielectric constant and lower dielectric loss indicating that this composition could be explored to high dielectric applications.