纳米A12O3填充LDPE／POM复合材料的力学和摩擦性能研究

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采用挤出混合与注塑成型制备出不同含量的纳米A12O3，填充LDPE／POM复合材料，并进行力学和摩擦磨损性能实验。结果表明，随着纳米A12O3，的增加，LDPE／POM复合材料的缺El冲击性能先提高后降低，其中添加8％纳米A12O3，后复合材料的缺口冲击强度提高了近3倍；添加A12O3，纳米粒子后增加了复合材料的摩擦因数，但对耐磨性影响不大。由于纳米A1203，作为刚性粒子可以提高材料的硬度，因此复合材料仍表现出良好的耐磨性；然而纳米粒子在摩擦表面富隼．产毕了型沟现象,因此提高了材料的摩擦因数。 The LDPE/POM composites with different contents of nano-alumina were injected into slab specimens by ex- trusion, and their mechanical and tribological properties were studied. The results show that the notched impact strength of LDPE/POM composites is firstly increased and then decreased with the increase of nano-alumina content. The notched im- pact strength is improved three times approximately for 8% nano-alumina/LDPE/POM composites as compared to LDPE/ POM composites. LDPE/POM composites filled with nano-alumina exhibit good wear resistance but a higher friction coeffi- cient. This could be attributed to the rigid particles of nano-alumina, which help to improve the hardness of LDPE/POM composites. However, the friction coefficient is increased due to the enrichment of nanoparticles between the sliding surface and the ploughing action.