真空成型压力参数对汽车用DF增强PES树脂材料力学性能的影响  

Tensile Property Improvement of Polyethersulfone Resins with Carbon-Fabric Reinforcement:An Experimental Study

作　　者：宋东方[1] 尹冠飞[1] Song Dongfang;Yin Guanfei(Henan Polytechnic School of Automotive Engineering of Zhengzhou City, Zhengzhou 450046, China)

机构地区：[1]河南职业技术学院汽车工程学院

出　　处：《真空科学与技术学报》2019年第7期542-545,共4页Chinese Journal of Vacuum Science and Technology

摘　　要：在碳纤维(DF)内加入聚醚砜(PES)树脂法,利用真空辅助成型(VARI)工艺制备得到改性复合材料,研究真空成型压力参数对汽车用DF增强PES树脂材料力学性能和拉伸断面的影响。研究结果表明:相对于改性前的PES树脂材料拉伸强度,经过0.1、0.25与0.5MPa处理得到的改性复合材料在拉伸强度方面依次提升了17.36%、41.39%与29.54%;拉伸模量依次提升1.61%、19.35%与10.48%。相对于原始纤维,经过改性形成了更加粗糙的表面结构,使纤维与树脂可以发生更加紧密的结合,经过改性的PES树脂材料形成的断口具有明显的韧性断裂特点。在0.25MPa下得到的改性PES树脂材料形成了明显断口结构,此时的试样获得了最优的拉伸强度与模量。The mechanical properties of polyethersulfone(PES) resins,an advanced material of auto-parts fabricated by vacuum assisted resin infusion(VARI),were improved by reinforcement of carbon fiber textile.The influence of the forming pressure,on the microstructures and mechanical behavior of modified PES resins,was investigated with scanning electron microscopy and tensile test.The results show that depending on the forming pressure,the reinforcement of C-fabric significantly improved the tensile strength/modulus of PES resins.For example,as the pressure increased from 0.1 to 0.25 and to 0.5 MPa,the tensile strength(tensile modulus) increased by 17.36%,41.39% and 29.54%,(by 1.61%,19.35% and 10.48%),respectively,simply because of the strongly increased adhesion at the interfaces of PES resins and C-fabrics.The optimized pressure was estimated to be 0.25 MPa.In addition,ductile fracture explained the fracture mechanism of the modified PES resins.

关 键 词：复合材料 定型压力 聚醚砜树脂 VARI工艺 拉伸性能 

分 类 号：TB332[一般工业技术—材料科学与工程]