POM/TPU/改性纳米ZnO复合材料的结晶与力学性能研究  

Study on Crystallization and Mechanical Properties of POM/TPU/Modified Nano-ZnO Composites

作　　者：李树材[1] 尚翠[1] 刘娜[1] 陈素兰[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《塑料科技》2015年第1期32-35,共4页Plastics Science and Technology

摘　　要：采用机械共混法和纳米ZnO表面偶联剂改性技术,制备了聚甲醛(POM)/热塑性聚氨酯(TPU)/改性纳米ZnO复合材料,并借助偏光显微镜(PLM)、差示扫描量热仪(DSC)和X射线衍射仪(XRD)分析了复合材料的结晶形态和结晶性能,研究了改性纳米ZnO用量对POM/TPU/改性纳米ZnO复合材料力学性能的影响。结果表明:改性纳米ZnO在体系中起到一定的异相成核作用,促进了POM的结晶,并使得POM球晶细化;当改性纳米ZnO用量为0.3%时,复合材料具有最佳综合力学性能。Polyoxymethylene （POM）lthermoplastic polyurethane （TPU）lmodified nano-ZnO composites were prepared by mechanical blending and nano-ZnO surface-modification technology with the coupling agent. The crystal morphology and crystallization characteristics of the composites were analyzed by polarizing microscope （PLM）, differential scanning calorimeter （DSC） and X-ray diffractometer （XRD）. Effects of nano-ZnO content on mechanical properties of POMITPU/modified nano-ZnO composites were studied. The results show that the nano-ZnO acts as heterogeneous nucleating agent in the composites, can promote the crystallization of POM, and diminish the spherulite size of POM. When the content of nano-ZnO is 0.3%, the composite demonstrate favourable comprehensive mechanical properties.

关 键 词：聚甲醛 热塑性聚氨酯 改性纳米ZnO 结晶 力学性能 

分 类 号：TQ326.51[化学工程—合成树脂塑料工业]