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.
出处
《工程塑料应用》
CAS
CSCD
北大核心
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)
关键词
PE—UHMW
纳米改性
力学性能
微观性能
PE-UHMW
nano modification
mechanical properties
microscopic properties
