Cyanate ester for domestic T800 carbon fiber and its composites properties

Abstract

In order to reduce the aircraft mass via high-temperature composite structures, and to extend the application of domestic T800 carbon fiber reinforced cyanate ester composites system, the sizing was analyzed, and the cyanate ester formulation was designed for the carbon fiber based on the sizing analysis. Meanwhile, the mechanical properties and heat resistance of the domestic T800 carbon fiber/cyanate ester composites were studied, and the effect of matrix on the composites interface was studied. The results indicate that the sizing of domestic T800 carbon fibers contain epoxy functional groups. With the formula optimized cyanate ester resin, the domestic T800 carbon fiber composite has greater mechanical property with the retention rate exceeding 74.8% at room-temperature with humidity, the retention of mechanical property is more than 57% at 200℃, and the glass transition temperature is 226℃. The composite exhibits excellent thermal mechanical and interfacial properties.

Keywords

• domestic T800 carbon fiber
• cyanate eater
• mechanical property
• glass transition temper-ature
• interfacial property