【作者】 王耀先； 程树军；

【Author】 WANG Yao-xian,CHENG Shu-jun (School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

【机构】 华东理工大学材料科学与工程学院；

【摘要】 为了改善超高分子量聚乙烯(UHMWPE)纤维和芳纶等高性能有机纤维增强树脂基复合材料的界面粘结性能,从树脂基体入手,依据相似相容原理和纤维的结构特点,开发出两种新型热固性树脂——PCH树脂和AFR树脂,分别用作UHMWPE纤维复合材料和芳纶复合材料的基体,以未经表面处理的纤维作增强材料,采用热压成型法制备了UHMWPE纤维/PCH、芳纶/AFR复合材料,并通过测定溶度参数、接触角、界面剪切强度、层间剪切强度(ILSS)、横向拉伸强度和观察断面形貌等方法研究了复合材料的界面粘结性能。结果表明,UHMWPE纤维和PCH树脂浇铸体的溶度参数相近,PCH树脂溶液在UHMWPE纤维表面的接触角为15.6°,说明对其具有良好的浸润性;UHMWPE/PCH复合材料的ILSS和单丝拔出强度分别为42.6MPa和21.8MPa,均远大于UHMWPE/环氧树脂(EP)复合材料的相应强度,扫描电镜分析也表明UHMWPE纤维增强PCH树脂基复合材料具有优异的界面粘结性能。AFR树脂溶液与芳纶纤维的接触角为42.8°,而EP与芳纶的接触角为68°,说明AFR树脂对芳纶的润湿性优于EP;芳纶/AFR复合材料的ILSS、横向拉伸强度和纵向拉伸强度分别为74.6MPa、25.3MPa和2256MPa,比芳纶/EP复合材料的相应强度分别提高了28.7%、32.5%和13.4%,其复合材料破坏面的形貌也说明芳纶与AFR树脂之间的界面粘结性能较好。更多还原

【Abstract】 In order to improve the interfacial adhesion of UHMWPE fiber and aramid fiber reinforced polymer matrix composites,two new thermosetting resin systems(PCH and AFR) have been developed according to law of similar mutual solubility and the structural characteristics of fibers.The adhesion properties of UHMWPE fiber/PCH and aramid /AFR composites were investigated by the methods of the contact angle,interlaminar shear strength, transverse tensile strength and scanning electron microscopy etc.Test results show that a strong interaction occurs between fibers and the matrix due to the structural and polar similarity.In the case of slight difference between solubility parameters of UHMWPE fiber and cured PCH resin,it is found that the wettability of PCH resin on surface of the fiber can be improved and UHMWPE /PCH composite has excellent transverse tensile strength,interlaminar shear strength and the pull-out strength together with the outstanding interfacial bond property.The contact angle (42.8°) between AFR resin and aramid fiber is smaller than the contact angle(68°) between the epoxy resin (EP) and aramid fibers.Therefore,the AFR resin had better wettability with the aramid fibers.The interlaminar shear strength,transverse tensile strength and longitudinal tensile strength of aramid/AFR composite are respectively 74.6 MPa,25.3MPa and 2256 MPa,increasing by 28.7%,32.5%and 13.4%respectively compared with aramid fibers/EP composite.According to the SEM photograph of aramid fibers/AFR composite,AFR resin had good interface bonding performance with aramid fibers.更多还原