高韧高强PA6/POE-g-MAH/MWNTs三元复合材料研究

Study on high-strength and high-toughness PA6/POE-g-MAH/MWNTs ternary composites

研究了聚乙烯-辛烯弹性体接枝马来酸(POE-g-MAH)和多壁碳纳米管(MWNTs)对尼龙6(PA6)的增韧增强作用。结果表明,对MWNTs酸化处理可在表面成功接枝上羧酸基团,并与PA6上的酰胺基团化学键合,提高MWNTs在PA6基体中的分散性,增加界面结合力,更好地承受载荷,可对PA6/POE-gAMAH共混增韧材料产生良好的增强效果。PA6/POE-g-AMAH/a-MWNTs(质量比为70/30/1)三元共混材料在保持纯PA6拉伸强度和弯曲强度的同时,冲击强度比纯PA6提高了6倍,是一种理想的高强高韧工程塑料。

The effect of nylon 6 (PA6 )toughened and enhanced by polyethylene-octene elastomer with maleic acid (POE-g-MAH)and multi-walled carbon nanotubes (MWNTs)were studied in this paper.The results indi-cated that the carboxylic groups that can bond with the amide groups of PA6 were successfully grafted on the surface of MWNTs through acidification,which can improve the dispersion of MWNTs in PA6 and increase the interfacial bonding strength so that the composites can endure more loads and which can also bring about the better enhancement effect for PA6/POE-g-MAH toughening Materials.The notch impact strength of PA6/POE-g-MAH/a-MWNTs(mass ratio of 69/30/1)that was an ideal high strength and high toughness engineering plas-tics was 6 times as that of PA6,while PA6/POE-g-MAH/a-MWNTs and PA6 had the same tensile and bending strength.