不同工艺参数和界面改性对碳纤维增强聚苯硫醚复合材料Ⅰ型层间断裂韧性的影响  

Effects of different process parameters and interfacial modification on the fracture toughness of type Ⅰ interfacial of carbon fiber reinforced polyphenylene sulfide composites

作　　者：常舰 肖海刚 谢钟清 毕华阳 郑金华 朱姝 侯进森[1,2] CHANG Jian;XIAO Hai-gang;XIE Zhong-qing;BI Hua-yang;ZHENG Jin-hua;ZHU Shu;HOU Jin-sen(Shanghai Composites Technology Co,Ltd,Shanghai 201112,China;Shanghai Engineering Research Center of Aerospace Resin Based Composites,Shanghai 201112,China;Collaborative Innovation Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;Shanghai Key Laboratory of Lightweight Structural Composites,Donghua University,Shanghai 201620,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China)

机构地区：[1]上海复合材料科技有限公司,上海201112 [2]上海航天树脂基复合材料工程技术研究中心,上海201112 [3]东华大学民用航空复合材料协同创新中心,上海201620 [4]东华大学上海市轻质结构复合材料重点实验室,上海201620 [5]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《复合材料科学与工程》2022年第1期22-28,共7页Composites Science and Engineering

基　　金：上海市科委科技创新行动计划项目(20511107200)。

摘　　要：本文研究了不同工艺参数(温度、压力、降温速率)和界面改性对碳纤维增强聚苯硫醚(CF/PPS)航空热塑性复合材料Ⅰ型层间断裂韧性的影响。试验发现较高成型温度(340℃)、较快降温速率(32℃/min)和经过界面改性的CF/PPS复合材料的Ⅰ型层间断裂韧性(G_(IC))更高。这是因为较高的温度有利于聚苯硫醚(PPS)分子链发生缠结;较快的降温速率抑制了PPS结晶,使基体韧性更好。利用课题组自制的上浆剂对碳纤维(CF)进行改性,发现经过界面改性的CF/PPS复合材料界面相互作用加强,强界面性能有利于应力和能量传递,因此G_(IC)值较未改性的CF/PPS复合材料更高。成型压力对CF/PPS复合材料的G_(IC)影响不明显,较高的成型压力反而会导致树脂对纤维的浸渍减弱,大量树脂从模具边缘间隙溢出,不利于复合材料韧性的提高。In this paper, the effects of different temperatures, pressures, cooling rates, and interfacial modification on the fracture toughness of type I interfacial of carbon fiber reinforced polyphenylene sulfide(CF/PPS) aeronautical thermoplastic composites were investigated. At higher molding temperature(340 ℃), fast cooling rate(32 ℃/min), and interfacial modification, CF/PPS composites exhibit higher G_(IC)value. The higher temperature favors the entanglement of the intermolecular matrix chains. The faster cooling rate suppresses the crystallization and makes the matrix tougher. The CF interfacial modification improves the interfacial interaction between the fiber and the matrix resin, which is beneficial to stress and energy transfer. This paper has reference value for the preparation and application of aeronautical thermoplastic composites. The effect of pressure on the G_(IC)of CF/PPS is not obvious. Higher molding pressure will cause the resin to impregnate the fibers weakly, and a large amount of resin will overflow from the gap between the mold edges, which is not conducive to the improvement of the toughness of the composite material.

关 键 词：热塑性复合材料 聚苯硫醚 断裂韧性 成型工艺 界面改性 

分 类 号：TB332[一般工业技术—材料科学与工程]