纳米碳化硅对超高分子量聚乙烯性能的影响

Effect of Nano Silicon Carbide on Properties of Ultra-high Molecular Weight Polyethylene

以纳米碳化硅（SiC）为改性剂,马来酸酐接枝聚乙烯为相容剂,用挤出成型的方式制备了超高分子量聚乙烯（UHMWPE）/纳米SiC复合材料,并对该复合材料的耐热性、微观形貌及力学性能进行了测试。在SiC用量一定的条件下,初步探究了相容剂用量及SiC在相容剂作用下对复合材料热性能的影响。结果表明：马来酸酐接枝聚乙烯用量为3%时,复合材料的耐热性提升最为显著;纳米SiC用量为5%时,在基体中分散效果最好,复合材料的耐热性与力学性能提升最为显著。

Ultra high molecular weight polyethylene（UHMWPE）/nano SiC composites were prepared by extrusion molding with nano silicon carbide（SiC） as modifier and maleic anhydride grafted polyethylene as compatibilizer. The heat resistance, micromorphology and mechanical properties of the composite were tested. Under the condition of a certain amount of SiC, the effect of the dosage of compatibilizer and the effect of SiC on the thermal properties of the composites under the action of compatibilizer was preliminarily investigated. The results show that： when the content of maleic anhydride grafted polyethylene is 3%, the heat resistance of the composites is the most significant. The effect of nano silicon carbide on the heat resistance of composites under the action of compatibilizer was emphatically analyzed. It was found when the content of nano silicon carbide is 5%, the dispersion of nano silicon carbide in the matrix is the best, and the increase of the heat resistance and mechanical properties of composites are the most notable.