双环戊二烯单体预聚增粘及其碳纤维增强复合材料性能评价  

Viscosifying dicyclopentadiene monomer by prepolymerization and evaluation of its continuous carbon fiber composites

作　　者：程超[1,3] 张晨宇 裴志磊 陈正国 周飞 周金利[5] 张辉[1] 孙泽玉[1] 余木火[1] CHENG Chao;ZHANG Chenyu;PEI Zhilei;CHEN Zhengguo;ZHOU Fei;ZHOU Jinli;ZHANG Hui;SUN Zeyu;YU Muhuo(College of Materials Science and Engineering,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;College of Materials Science and Engineering,Shanghai University of Engineering and Technology,Shanghai 201620,China;Shanghai Carbon Fiber Composites Innovation Institute CO.,LTD.,Shanghai 201512,China;Sinopec Shanghai Petrochemical CO.,LTD.,Chemical Department,Shanghai 200540,China;College of Textiles,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]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 [2]上海工程技术大学材料工程学院,上海201620 [3]上海碳纤维复合材料创新研究院有限公司,上海201512 [4]中国石化上海石油化工股份有限公司化工部,上海200540 [5]中原工学院纺织学院,郑州450007

出　　处：《复合材料学报》2024年第1期155-169,共15页Acta Materiae Compositae Sinica

基　　金：上海市“科技创新行动计划”高新技术领域项目(20511107100);中央高校基本科研业务费专项资金(2232020G-12);河南省科技攻关项目(212102210036)。

摘　　要：聚双环戊二烯(PDCPD)作为一种综合性能优异的热固性树脂,可与连续碳纤维进行复合,应用在工程领域上,以满足轻量化和节能环保需求。本文首先通过调节双环戊二烯单体(DCPD)与Grubbs 2代催化剂的质量比使其只聚合不交联,调节黏度以满足真空辅助灌注成型(VARI)工艺对树脂特性的要求。随后对碳纤维表面进行丙酮去浆处理,再与上述加入足量催化剂的预聚物进行复合。对比PDCPD复合材料与通用型环氧树脂复合材料的拉伸、弯曲、V型缺口剪切、层间Ⅰ型以及Ⅱ型断裂韧性、冲击和热力学性能,研究PDCPD复合材料在不同加载模式下的失效机制,探寻其在工程领域应用的关键点和方向。结果表明,去浆后碳纤维与PDCPD界面结合良好,PDCPD复合材料在强度上与环氧树脂相当,在抵抗变形能力上较弱,但是在遭受高于极限强度的载荷后,仍然具有一定程度的承载能力;从层间断裂韧性来看,PDCPD复合材料Ⅰ型断裂韧性和Ⅱ型断裂韧性分别相当于环氧树脂复合材料的406%和250%,具有优异的抵抗分层能力;对比两种复合材料抗冲击性能,3.2 mm的PDCPD复合材料层合板在40 J能量的冲击下,表面产生层合板勉强可见冲击损伤(BVID),背面无明显纤维破裂现象,剩余冲击压缩强度比环氧树脂复合材料高34.7%。Polydicyclopentadiene(PDCPD)as a thermosetting resin with excellent comprehensive performance,can be composited with continuous carbon fibers(CF),for the application of various engineering field to meet the requirements of lightweight,energy conservation and environmental protection.In this paper,firstly,the viscosity of the DCPD prepolymer could meet the demands of vacuum assisted resin infusion(VARI)molding process by adjusting the content of Grubbs 2 catalyst.Subsequently,the carbon fiber was subjected desizing treatment,and then compounded with the prepolymer added with sufficient catalyst.The tensile,flexural,V-notch shear,interlaminar fracture toughness,impact,and thermodynamic properties of PDCPD/CF composites were compared with the general epoxy resin(EP)/CF composites,The failure mechanisms of PDCPD/CF composites under different loading modes were detected,and the key points and directions for their application in the engineering field were explored.The results show that the interface between the carbon fibers after desizing and PDCPD is well bonded,and the strength of PDCPD/CF composite is comparable to that of EP/CF composite.Although PDCPD/CF composite had weaker deformation resistance,they still had a certain degree of bearing capacity after being subjected to the ultimate loads.From the perspective of interlaminar fracture toughness,PDCPD/CF composites have excellent delamination resistance,with mode I and mode II fracture toughness equivalent to 406%and 250%of CF/EP composites,respectively.A barely visible impact damage(BVID)has formed on the top surface of a 3.2 mm-thickness PDCPD laminate after being subjected to a 40 J impact,while there is no significant fiber breakage on the bottom surface.The residual compression strength of PDCPD/CF composites is 34.7%higher than the EP/CF composite.

关 键 词：聚双环戊二烯 力学性能 复合材料液体成型 树脂基复合材料 层间断裂韧性 

分 类 号：TQ323.42[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]