振动挤出对HDPE/碳纤维复合材料流变行为和性能的影响  

Effect of Vibration Extrusion on Rheological Behavior and Properties of HDPE/CF Composites

作　　者：王中武[1] 胡娟[1] 高雪芹[1] 邓聪[2] 申开智[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610065 [2]四川大学分析测试中心,四川成都610065

出　　处：《塑料科技》2012年第10期31-35,共5页Plastics Science and Technology

基　　金：国家自然科学基金(50803038;50903054;50873072)

摘　　要：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。The rheological behaviors of HDPE/carbon fiber （CF） composites were studied by introducing vibration field, and the relationship between structure and mechanical properties was also analyzed by tensile strength test, differential scanning calorimeter （DSC） and scanning electron microscopy （SEM）. The results indicate that： with the exertion of vibration field, the apparent viscosity declines obviously, the largest decline is 56.95%, and the mechanical properties of HDPE/CF composites improve, and then tensile strength increases by 15.1%; the improvement of mechanical properties of composites due to the change of morphological structure. Vibration can promote the crystal refinement, crystalline regularity and crystallinity of HDPE/CF composites, and can improve the interface adhesive action between CF and matrix material.

关 键 词：振动场 挤出成型 高密度聚乙烯 碳纤维复合材料 流变行为 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ342.742