【作者】 刘程；

【机构】 大连理工大学,化工学院高分子材料系； 大连理工大学,化工学院精细化工国家重点实验室； 大连理工大学,化工学院智能材料化工前沿科学中心；

【摘要】 飞行器结构装备轻量化一直是航空航天领域发展方向,特别具有高比强度和高比模量的连续碳纤维增强热塑性树脂基复合材料的应用可显著实现飞行器减重。然而,现有热塑性树脂存在耐温性低、加工困难和与碳纤维界面匹配性差等问题。针对此难题,本课题组从分子设计出发,设计了系列可耐高温且具有优异加工性能的杂环聚芳醚树脂,并设计与之匹配的可耐高温上浆剂,制备了连续碳纤维增强杂环聚芳醚树脂基复合材料。力学性能测试结果表明复合材料的弯曲强度和ILSS由1183MPa和61MPa分别提高至1271MPa和85 MPa,提升了7.4%和39.3%,而且250℃下弯曲强度保持率可达65%以上。经失效模式分析发现上浆剂显著改善了复合材料的界面性能,提高了界面相的载荷传递效率,使复合材料的宏观力学性能得到显著提升。更多还原

【Abstract】 Lightweighting of aircraft structural equipment has always been the direction of development in the aerospace field,especially the application of continuous carbon fibre reinforced thermoplastic matrix composites with high specific strength and high specific modulus can significantly achieve weight reduction of aircraft.However,the existing thermoplastic resins have the problems of low temperature resistance,difficult processing and poor matching with carbon fibre interface.In order to address this issue,our group has designed a series of high temperature resistant heterocyclic polyarylene ether resins with excellent processing performance from molecular design,and designed matching high temperature resistant sizing agents to prepare continuous carbon fibre reinforced heterocyclic polyarylene ether matrix composites.The mechanical property test results showed that the flexural strength and ILSS of the composites were increased from 1183 MPa and 61 MPa to 1271 MPa and 85 MPa,respectively,which were improved by 7.4% and 39.3%,and the retention of flexural strength at 250℃ could reach more than 65%.The failure mode analysis revealed that the sizing agent significantly improved the interfacial properties of the composites,increased the load transfer efficiency of the interfacial phase,and resulted in a significant enhancement of the macroscopic mechanical properties of the composites.更多还原