纳米蒙脱土对超高分子量聚乙烯性能的影响

Effect of Nano Montmorillonite on Properties of Ultra-High Molecular Weight Polyethylene

纳米材料改性剂对超高分子量聚乙烯(UHMW-PE)各项性能的增强具有显著的效果。通过挤出成型的方式,以有机纳米蒙脱土(OMMT)作为改性剂,马来酸酐接枝聚乙烯作为相容剂,制备了OMMT/UHMW-PE复合材料。对经不同含量OMMT改性的复合材料进行耐热性测试、SEM测试、DSC测试、XRD测试及力学性能测试,重点分析了OMMT在相容剂作用下对复合材料耐热性的影响。当OMMT含量为8%时,OMMT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。并在OMMT含量一定的条件下,通过改变相容剂的含量及进行耐热性测试,初步探究了相容剂含量对复合材料热性能的影响,发现当马来酸酐接枝聚乙烯含量为3%时,复合材料耐热性的提升最为显著。

Nano material modifier had remarkable effect on enhancing the performance of ultra-high molecular weight polyethylene （UHMW-PE）. The composite was prepared with organic nano montmorillonite （OMMT） as the modifier and maleic anhydride grafted polyethylene as a compatibilizer in the extrusion process. The heat resistance test, SEM,DSC, XRD and mechanical property were carried out on the composite modified with different content of OMMT. The effect of OMMT on the heat resistance of composite under the action of compatibilizer was emphatically analyzed. It was found when the content of OMMT was 8% , the dispersion of OMMT in the matrix was the best, and the increase of the heat resistance and mechanical properties of composite were the most notable. Under the condition of certain content of OMMT, the influence of compatibilizer content on the thermal properties of composite was investigated by changing the content of compatibilizer and the test of heat resistance. It was found when the content of maleic anhydride grafted polyethylene was 3% , the heat resistance of composite was improved most.