Fabrication and properties of aluminum phosphate framework/bismaleimide composites with double‐crosslinking structures

Abstract

Aluminum phosphate (AP) framework/bismaleimide (BMI) composites were successfully prepared by the direct blending with phosphates and α-Al 2 O 3 . Among them, the flexural strength of 20 wt% AP/BMI composites approached 47.5 MPa after thermal treatment at 300 C. The maximum decomposition temperature (T max = 650.2 C) and glass transition temperature (T g = 299.8 C) was increased by 67.7 and 19.1 C, respectively. Furthermore, the dielectric constant (ε) of 20 wt% AP/BMI composites was approximately 3.12 at 500 kHz. After pyrolysis of BMI matrix, the reserved AP reinforcement was the threedimensional (3D) crosslinking framework. Therefore, the direct blending is a facile method to obtain double-crosslinking inorganic/organic composites, and they would be potentially used as the high-performance, low defect, and thermal resistant composites.