PE-UHMW/SiO_2复合材料的微观性能研究  

Study on Micro-Properties of PE-UHMW/SiO_2 Composite

作　　者：张炜[1] 冯玲英[1] 李志[1] 吴向阳[1] 许振华[1] 

机构地区：[1]上海化工研究院技术开发中心,上海200062

出　　处：《工程塑料应用》2013年第10期30-33,共4页Engineering Plastics Application

基　　金：上海市科学技术委员会项目(11nm0501700)

摘　　要：利用球磨反应对纳米SiO2表面进行处理,用以制备超高分子量聚乙烯(PE-UHMW)/SiO2复合材料,并通过力学性能测试、X射线衍射测试及扫描电子显微镜研究分析复合材料的力学性能、耐热性、结晶度、微晶尺寸、缠结点密度等。结果表明,与纯PE-UHMW相比,经过纳米SiO2改性的PE-UHMW材料,其微晶尺寸降低、缠结点密度增大,非结晶区与结晶区之间的应力传递增强,界面之间能量吸收能力增强,使PE-UHMW/SiO2复合材料的耐热性能、韧性和刚性均得到了明显的改善。The surface of SiO2 nanoparticles was treated via the ball milling reaction and PE-UHMW / SiO2 composites were thus prepared. The mechanical properties, heat resistance, crystallinity, crystallite size, density of entanglement points were determined by mechanical properties, Xray diffraction and SEM test. The results indicate that compared with untreated PE-UHMW, the crystallite size of PE-UHMW modified by nano-SiO2 decrease, while the node density increase. The stress transmission between amorphous and crystalline regions and the interface energy absorption capability of PE-UHMW/SiO2 composites also increase. So the heat resistance, toughness and rigidity properties of PE-UHMW / SiO2 composites are obviously improved.

关 键 词：PE—UHMW 纳米改性 力学性能 微观性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]