真空辅助灌注成型用聚双环戊二烯的制备及其碳纤维增强复合材料的性能研究  

Preparation and performance research of carbon fiber reinforced polydicyclopentadiene composites based on vacuum-assisted resin infusion processing

作　　者：杨青 程超[2] 刁春霞 吕玥蒽 周飞[3] 丁小马 陈正国 YANG Qing;CHENG Chao;DIAO Chun-xia;LU Yue-en;ZHOU Fei;DING Xiao-ma;CHEN Zheng-guo(Shanghai Carbon Fiber Composites Innovation Institute Co.,Ltd.,Shanghai 201512,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Chemical Department,Sinopec Shanghai Petrochemical Co.,Ltd.,Shanghai 200540,China)

机构地区：[1]上海碳纤维复合材料创新研究院有限公司,上海201512 [2]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620 [3]中国石化上海石油化工股份有限公司化工部,上海200540

出　　处：《复合材料科学与工程》2022年第6期89-95,共7页Composites Science and Engineering

基　　金：上海市科委项目(19DZ1100800)。

摘　　要：本文采用聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物作为DCPD单体的增黏剂,以亚磷酸正三丁酯作为缓聚剂,使其工艺特性满足真空辅助灌注成型,成功制备碳纤维增强聚双环戊二烯复合材料。通过研究增黏剂含量对单体黏度和聚合后树脂力学性能的影响确定树脂体系的组分配方。利用VARI工艺制备复合材料,研究了改性聚双环戊二烯/碳纤维复合材料的Ⅰ型断裂韧性以及弯曲性能,并与环氧树脂/碳纤维复合材料进行比较。研究结果表明,由该树脂体系制备的碳纤维复合材料Ⅰ型层间断裂韧性起始值和扩展值分别比环氧树脂/碳纤维复合材料高26.1%和30.4%,但是弯曲强度较低。微观结构表明,碳纤维表面残留聚双环戊二烯树脂发生明显塑性变形,消耗更多的能量,从而获得更高的Ⅰ型断裂韧性,然而树脂与碳纤维界面结合力较差,载荷无法实现在树脂与树脂之间的良好传递,最终导致较低的弯曲强度。In this paper,carbon fiber reinforced polydicyclopentadiene(PDCPD)composites,based on the liquid resin infusion process,were successfully prepared with the addition of polystyrene-polybutadiene-polystyrene(SBS)copolymer and tributyl phosphite for the purpose of tackifying and retarding polymerization,respectively.The composition of the hybrid resin system is determined by studying the influence of the tackifier content on the monomer viscosity and the mechanical properties of the resin after polymerization.The SBS/PDCPD/carbon fiber composite was prepared by the VARI process,and the modeⅠinterlaminar fracture toughness and flexural properties of were compared with the epoxy resin/carbon fiber composite.The results show that the initiation and propagation values of modeⅠinterlaminar fracture toughness of the carbon fiber composite prepared by SBS/PDCPD is 26.1%and 30.4%higher than the epoxy resin/carbon fiber composite,while the flexural strength is lower.The microstructure shows that the residual polydicyclopentadiene resin on the surface of the carbon fiber undergoes significant plastic deformation,but the bonding force between the resin and the carbon fiber is poor,and the load cannot be transmitted well between the resin and the fiber,resulting in poor flexural properties.

关 键 词：真空辅助灌注成型 聚双环戊二烯 层间断裂韧性 弯曲性能 界面结合 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]