【摘要】 选用一种在RTM双马来酰亚胺树脂（BMI）注射温度下不溶解的含磷聚芳醚酮（P-PAEK）热塑性树脂作为增韧剂,制备层间颗粒增韧碳纤维增强双马来酰亚胺树脂基复合材料.研究了不同热塑树脂含量对树脂浇铸体冲击性能的影响,利用扫描电镜表征了复相体系的微观形貌并分析其增韧机制,并通过层间断裂韧性测试表征了RTM双马树脂基复合材料增韧前后的层间韧性性能.结果表明,当附载热塑颗粒面密度为2 g/m2时,复合材料的I型层间断裂韧性（GIC）为0.54 k J/m2,II型层间断裂韧性(G_IIC)为1.36 k J/m²,较未增韧复合材料分别提升约56%和42%.增韧后的复合材料在保持原有力学性能的同时,其冲击后压缩强度（CAI）提升约29%,层间剪切强度达到111.7 MPa.更多还原

【Abstract】 The phosphorus-containing poly( arylene ether ketone)( P-PAEK) with the advantage of insolubility in BMI resin at the injection temperature was chosen as the toughener of RTM resin. The U3160 carbon fiber reinforced BMI resin composites interlaminar toughened by P-PAEK particles was fabricated via RTM process. Through research on the influence of P-PAEK particles with different contents on the impact strength properties of BMI resin,it was found that the toughness of matrix resin could be greatly improved by adding a few thermoplastic resin particles. The impact strength was increased from 10. 3 k J / m2 to 30. 3 k J / m2.The microscopic morphology was observed by SEM and toughening mechanism was analyzed. When the content of P-PAEK increased,the microstructure of TP / TS system experienced sea-island,co-continuous and phase inversion transition. The sea-island structure could absorb more energy than the other one,which attributed to the toughening mechanism of rigid particles. The interlaminar fracture properties of the composite were characterized by Mode Ⅰ and Mode Ⅱ fracture toughness tests. It was found that the GICand GIICof toughened U3160 / BMI composites were well improved when the areal density of P-PAEK particles was 2 g / m2. It was improved 56% of GICand 42% of GIICcompared to the U3160 / BMI composites. The mechanical properties of composites were well kept,as the CAI increased by 29% and interlaminar shear strength was 111. 7 MPa.更多还原