模压成型工艺参数对CF/PEEK复合材料Ⅰ型层间断裂韧性的影响  

Influence of hot-press molding parameters for processing CF/PEEK composites on Type Ⅰ Interlaminar Fracture Toughness

作　　者：史如静 吴举 周剑锋[1] 朱姝[1] 杨洋 卿雪芹 马禹[1] SHI Rujing;WU Ju;ZHOU Jianfeng;ZHU Shu;YANG Yang;QING Xueqin;MA Yu(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;Shanghai General Hospital,Shanghai Jiao Tong University School of Medicine(originally named“Shanghai First People’s Hospital”),Shanghai 201600,China;Shanghai Aircraft Manufacturing Company,Shanghai 201324,China)

机构地区：[1]东华大学纤维材料改性国家重点实验室,材料科学与工程学院,民用航空复合材料东华大学协同创新中心,上海201620 [2]上海市第一人民医院松江南院,上海201600 [3]上海飞机制造有限公司,上海201324

出　　处：《高科技纤维与应用》2020年第1期26-32,共7页Hi-Tech Fiber and Application

摘　　要：连续碳纤维增强聚醚醚酮(CF/PEEK)复合材料是重要的医疗器械及航空航天热塑性复合材料,可采用模压成型工艺制备层合板及结构,其工艺参数影响复合材料力学性能。本文主要考察了模压成型温度、压力以及降温速率等参数对CF/PEEK复合材料Ⅰ型层间断裂韧性(G IC)的影响规律,并通过扫描电镜表征复合材料撕裂面的微观形貌,分析材料失效模式。较高的模压成型温度可提高基体分子链流动性,适中的成型压力有利于控制树脂不被过多挤出模具,适中的降温速率可降低结晶度并抑制界面粘结强度的损失,均有利于提高CF/PEEK复合材料的G IC。Continuous carbon fiber reinforced polyetheretherketone(CF/PEEK)composites are important thermoplastic composites for medical apparatus and aerospace applications.The laminates and structures can be prepared by the compression molding process.The process parameters affect the mechanical properties of CF/PEEK composites.In this paper,the effects of molding temperature,pressure and cooling rate on the mode I interlaminar fracture toughness(G IC)of CF/PEEK composites were investigated.The micro morphologies of the teared surface of the composites were characterized by scanning electron microscope(SEM)and the failure mode was analyzed.Higher molding temperature brings higher fluidity of molecular chain of PEEK matrix;moderate molding pressure is conducive to control the resin from being extruded too much;moderate cooling rate can reduce the crystallinity and inhibit the loss of interfacial bond strength.All these are beneficial to improving G IC of CF/PEEK composite.

关 键 词：碳纤维(CF) 热塑性复合材料(TPRC) 聚醚醚酮(PEEK) 模压成型 Ⅰ型层间断裂韧性(G IC) 

分 类 号：TQ342.71[化学工程—化纤工业] V2583[一般工业技术—材料科学与工程]