悬浮改性耐高温环氧树脂基复合材料的性能与增韧机制  

Properties and Toughening Mechanism of Suspension⁃modified High⁃temperature Resistant Epoxy Matrix Composites

作　　者：陈子豪 阮英波 杨杰[1] CHEN Zihao;RUAN Yingbo;YANG Jie(Shaanxi Key Laboratory of Aerospace Composites,Xi'an Aerospace Composites Research Institute,Xi'an 710025,China)

机构地区：[1]西安航天复合材料研究所,陕西省航天复合材料重点实验室,西安710025

出　　处：《材料导报》2023年第S02期564-568,共5页Materials Reports

摘　　要：针对热塑性树脂改性环氧树脂体系黏度迅速增加的问题,本工作采用酚酞基聚芳醚酮(PEK⁃C)悬浮增韧改性耐高温环氧树脂,研究了PEK⁃C悬浮法和溶解法增韧对改性树脂体系的流变性能、增韧效果和耐热性能的影响。结果表明,PEK⁃C悬浮体系的稳定性能较好,规避了PEK⁃C溶解体系黏度高的问题,在室温下的黏度满足湿法缠绕的要求。PEK⁃C在环氧树脂悬浮体系中的溶解性能优异,对环氧树脂本身固化反应和PEK⁃C相分离过程的影响较小。本工作将改性树脂体系和原树脂体系湿法缠绕成型碳纤维复合材料层压板,证明PEK⁃C的引入提升了复合材料的力学性能,通过扫描电子显微镜(SEM)和显微镜表征了层压板拉伸断面的微观结构,探究了PEK⁃C改性碳纤维复合材料的增韧机制。In view of the rapid increase of viscosity of thermoplastic resin modified epoxy resin system,this paper adopts phenolphthalein⁃based polyaryletherketone(PEK⁃C)suspension toughening to modify high temperature resistant epoxy resin.The effects of PEK⁃C suspension and solution toughening on the rheological properties,toughening effect and heat resistance of the modified resin system were studied.The results show that the stability of the PEK⁃C suspension system is good,that the problem of high viscosity of the PEK⁃C solution system is avoided,and that the viscosity at room temperature can be used for wet winding.PEK⁃C has excellent solubility in suspension system,and has little effect on the curing reaction of epoxy resin itself and the phase separation process of PEK⁃C.The modified resin system and original resin system are wet wound to form carbon fiber composite laminates,and it is proved that the introduction of PEK⁃C improved the mechanical properties of the composites.The tensile section of the laminate is characterized by scanning electron microscopy(SEM)and microscopy.The microstructure and toughening mechanism of PEK⁃C modified composites are explored.

关 键 词：环氧树脂 酚酞侧基聚芳醚酮(PEK-C) 碳纤维复合材料 增韧 

分 类 号：TB332[一般工业技术—材料科学与工程]