几种碳纤维/双马树脂复合材料湿热特性实验研究

 针对碳纤维/双马树脂体系，研究了不同湿热条件、不同碳纤维种类和预浸料制备方法下复合材料层板的湿热特性，通过考察吸湿量、动态力学性能、弯曲性能及其断口形貌等方面分析了各因素对复合材料吸湿特性的影响规律。结果表明，在实验范围内不同湿热条件下水分主要引起复合材料发生了物理变化，而没有发生明显的化学变化；国产T300级碳纤维复合材料湿热性能偏低，这与其界面粘结性能较弱有一致性；与干法预浸料相比，湿法预浸料制备的复合材料层板湿热性能明显偏低，说明溶剂对双马树脂复合材料的界面性能和吸湿性有重要影响。

Experimental Study on Hygrothermal Properties of Several Kinds of Carbon Fiber/BMI Resin Composites

The hygrothermal properties of carbon fiber reinforced bismaleimide (BMI) resin composite laminates are investigated under the influence of different factors including hygrothermal condition, carbon fiber type and preparing method of prepreg. Moisture absorption, dynamic mechanical property, flexural property and fracture morphology are adopted to analyze the effects of various factors on hygrothermal properties of composites. Results show that under different hygrothermal conditions, there are only physical changes in the composites and no obvious chemical changes happen. The domestic T300 carbon fiber/BMI resin composite has lower hygrothermal stability, which is in accordance with its poor interfaeial adhesive property. The composite prepared with solution method prepreg has lower hygrothermal property than that prepared with melt method prepreg, indicating that solvent has significant effects on the interracial and hygroscopic properties of BMI resin composites.