连续碳纤维增强液晶高分子层压板材的性能  

Properties of Continuous Carbon Fiber Reinforced Liquid Crystal Polymer Laminates

作　　者：刘学杰 吴炳霖 安政宇 索向龙 贺磊[1] 谭洪生 LIU Xuejie;WU Binglin;AN Zhengyu;SUO Xianglong;HE Lei;TAN Hongsheng(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《塑料工业》2024年第12期168-174,共7页China Plastics Industry

基　　金：复合材料预制体柔性导向三维织造工艺参数研究(ZR2022ME187)。

摘　　要：采用自行设计和组装的连续纤维增强热塑性预浸带熔融浸渍装置,制备了连续碳纤维(CCF)增强聚芳酯液晶高分子(LCP)预浸带,再将预浸带通过热压成型制备出层压板材。通过万能材料试验机、扫描电子显微镜(SEM)、动态力学分析仪(DMA)和差示扫描量热仪(DSC)研究了不同纤维质量分数对层压板材力学性能、断面微观形貌、动态力学行为和熔融结晶行为的影响。力学性能测试结果表明,在一定范围内层压板材的拉伸强度、弯曲强度和层间剪切强度随纤维质量分数的增加而提高。当纤维质量分数为39.6%时,层压板材的拉伸强度、弯曲强度和层间剪切强度分别为788.43、395.08和31.42 MPa,与LCP纯料相比分别提高了5.3、2.1和2.9倍。SEM结果表明,纤维质量分数为39.6%时,CCF被LCP树脂基体完全包覆,纤维和树脂之间的界面黏结性较好。DMA结果表明,层压板材的储能模量和损耗模量随着纤维质量分数的增加而提高。DSC结果表明,CCF的加入显著提高了层压板材的熔融温度和结晶温度。Continuous carbon fiber(CCF)reinforced liquid crystal polymer(LCP)prepreg tapes were prepared by a self-designed and assembled continuous fiber reinforced thermoplastic prepreg tape melt impregnation device,and then the laminates were prepared by hot pressing of prepreg tapes.The universal material testing machine,scanning electron microscope(SEM),dynamic mechanical analyzer(DMA)and differential scanning calorimeter(DSC)were used to study the effects of different fiber mass fractions on the mechanical properties,cross-section microstructures,dynamic mechanical behaviors and melting crystallization behaviors of laminates.The mechanical properties test results show that the tensile strength,bending strength and interlaminar shear strength of laminates increase with the increase of fiber mass fraction in a certain range.When the fiber mass fraction is 39.6%,the tensile strength,bending strength and interlaminar shear strength of the laminate are 788.43,395.08 and 31.42 MPa,respectively,which are 5.3,2.1 and 2.9 times higher than those of the LCP pure material.The SEM results show that when the fiber mass fraction is 39.6%,CCFs are completely coated by the LCP resin matrix,and the interfacial bonding between the fiber and the resin is better.DMA results show that the storage modulus and loss modulus of laminates increase with the increase of fiber mass fraction.DSC results show that the CCF addition significantly increases the melting temperature and crystallization temperature of the laminates.

关 键 词：连续碳纤维 液晶高分子 熔融浸渍 热压成型 层压板材 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]