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通过在挤出成型过程中引入振动场,研究了加工过程中HDPE/碳纤维(CF)复合材料在振动场中的流变行为,并借助拉伸性能检测以及差示扫描量热分析(DSC)、扫描电镜(SEM)等测试方法,分析了HDPE/CF复合材料的结构与性能。结果表明:振动挤出可以显著降低熔体的表观黏度,最大降幅为56.95%,同时还可改善制品的力学性能,拉伸强度最大增幅为15.1%;材料力学性能的提高可归因于其微观形态结构的变化,振动使HDPE/CF复合材料基体晶粒细化、晶体排列更加规整、结晶度略有提高,并增强了CF与基体间的界面黏合作用。
Through the introduction of vibration field during the extrusion process, the rheological behavior of HDPE / carbon fiber (CF) composite in the vibration field was studied. With the help of tensile properties and differential scanning calorimetry (DSC) Scanning electron microscopy (SEM) and other testing methods, the structure and properties of HDPE / CF composites were analyzed. The results show that the vibrational extrusion can significantly reduce the apparent viscosity of the melt, the maximum decrease of 56.95%, while also improving the mechanical properties of the product, the maximum increase of tensile strength of 15.1%; mechanical properties can be increased due to its The changes of microstructure and vibration make the matrix of HDPE / CF composite material refinement, the crystal arrangement is more regular, the crystallinity is slightly increased, and the interfacial adhesion between CF and matrix is enhanced.