环氧树脂改性聚双环戊二烯及其碳纤维复合材料的制备与表征  

Preparation and characterization of epoxy resin-modified polydicyclopentadiene and its carbon fiber composites

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 Chunxia;LU Yueen;ZHOU Fei;DING Xiaoma;CHEN Zhengguo(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 Lniversity,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》2023年第5期32-36,共5页Composites Science and Engineering

基　　金：上海市科委项目(19DZ1100800)。

摘　　要：本文在双环戊二烯单体/Grubbs二代催化剂体系中加入双酚A型环氧树脂配套甲基纳迪克酸酐固化剂,通过逐步升温聚合得到环氧树脂/聚双环戊二烯(PDCPD)共混物。利用接触角测量仪、差示扫描量热仪(DSC)、红外光谱仪(FT-IR)、力学试验机和扫描电镜(SEM)对环氧树脂改性PDCPD进行了表征。研究结果表明:加入10 phr环氧树脂的DCPD单体与碳纤维织物表面接触角由83.2°降低至22.6°,润湿性得到明显改善;环氧树脂改性PDCPD相比于纯PDCPD,玻璃化转变温度由124.7℃提升至133.2℃;改性PDCPD红外光谱中未发现环氧官能团(913 cm^(-1)),说明混合体系中环氧树脂反应完全;力学性能测试结果表明改性后PDCPD弯曲强度提升13.3%,断裂韧性降低11.0%,微观结构显示环氧树脂固化物呈直径小于2μm的微球均匀分布在PDCPD内部;利用湿法模压制备的改性PDCPD/碳纤维复合材料层间剪切强度由8.2 MPa提升至15.1 MPa,断面结构显示环氧树脂的加入有效改善了PDCPD对碳纤维的附着力。In this paper, bisphenol A epoxy resin with methyl nadic acid anhydride curing agent was added to DCPD monomer/Grubbs 2nd catalyst, blend polymer was obtained by step reaction polymerization. Contact angle meter, differential scanning calorimeter(DSC), infrared spectrometer(FT-IR), mechanical testing machine and scanning electron microscope(SEM) were used to characterize the epoxy resin-modified PDCPD. The results show that the wettability between modified DCPD monomer and the carbon fiber fabric is significantly improved as the contact angle decreased from 83.2° to 22.6°, and the glass transition temperature of 10 phr epoxy-modified PDCPD is increased from 124.7 ℃ to 133.2 ℃. No epoxy functional group(913 cm^(-1)) is found in the infrared spectrum of the modified PDCPD, indicating that the epoxy resin in the mixed system reacts completely. The mechanical test shows that the flexural strength of PDCPD after modification is increased by 13.3%, and the fracture toughness is decreased by 11.0%. The microstructure shows that the cured epoxy resin is uniformly distributed inside the PDCPD as microspheres with a diameter of less than 2 μm. The interlaminar shear strength of the carbon fiber composite based on PDCPD after modification is increased from 8.2 MPa to 15.1 MPa, the cross-sectional structure shows that the addition of epoxy resin can effectively improve the adhesion of PDCPD to carbon fibers.

关 键 词：聚双环戊二烯 环氧树脂 共混改性 碳纤维增强复合材料 界面结合 

分 类 号：TB332[一般工业技术—材料科学与工程]