含磷聚芳醚酮-双马来酰亚胺树脂(PAEK-P-BMI)及碳纤维/PAEK-P-BMI复合材料

为提高树脂传递模塑(RTM)复合材料的整体韧性，结合“离位”复合增韧技术和RTM制造技术，应用新型热塑性含磷聚芳醚酮(PAEK-P)对碳纤维/双马来酰亚胺树脂(CF/BMI)复合材料进行增韧改性，研究了PAEK-P-BMI复合树脂的流变性能、分相行为及PAEK-P对CF/BMI复合材料韧性的影响。结果表明，分子链的刚性结构使PAEK-P具有高的耐热性，玻璃化转变温度达到268.8℃，PAEK-P在BMI树脂中的溶解性较差，PAEK-P-BMI复合树脂凝胶时间和黏度急增拐点时间受PAEK-P含量的影响很小；PAEK-P-BMI复合树脂在110℃/300 min条件下未出现相分离，但在后期的高温固化过程形成了分相结构，并在CF/PAEK-P-BMI复合材料中保持了分相形貌；与CF/BMI复合材料相比，CF/PAEK-P-BMI复合材料的冲击后损伤投影面积降低了69%，冲击后压缩强度提高了16.6%，冲击凹坑深度减小了34.4%。 

Phosphorus-containing polyaryletherketone-bismaleimide resin (PAEK-P-BMI) and carbon fiber/PAEK-P-BMI composites

In order to improve the toughness of resin transfer molding(RTM) composites, combining the “ex-situ” composite toughening technology and RTM processing, a novel thermoplastic phosphorus-containing polyaryletherketone(PAEK-P) was used to toughen the carbon fiber/bismaleimide resin(CF/BMI) composites. The rheological properties, phase separation behavior of the PAEK-P-BMI resin and the effect of PAEK-P upon the toughness of the CF/BMI composites were investigated. The results show that the PAEK-P resin has high heat resistance at the glass transition temperature of 268.8℃ for its rigid structure. The gel time and viscosity increase inflection point time of the PAEK-P-BMI composite resin are little affected by the PAEK-P content because of its poor solubility in BMI resin. The PAEK-P-BMI composite resin shows no phase separation at 110℃/300 min. However, the phase separation structure is formed in the late high temperature curing process, and the phase separation morphology is maintained in the cured CF/PAEK-P-BMI composites. Compared with CF/BMI composites, the CF/PAEK-P-BMI composites have a 69% reduction in damage area after impact, a 16.6% increase in compressive strength after impact, and a 34.4% reduction in impact pit depth.