Multi-walled carbon nanotubes (MWCNTs) were readily dispersed and distributed in the high density polyethylene (HDPE) matrix and a very low (<0.3 wt%, 0.17 vol%) rheological percolation threshold obtained. The polymer is seen to coat the MWCNTs, which act as a nucleating agent and induce an oriented nanohybrid shish-kebab (NHSK) crystalline structure, in part an artefact of the injection moulding process. The elastic modulus and yield stress of HDPE increased on addition of MWCNTs, but the polymer strain at break increased sharply below percolation before decreasing again above percolation. Addition of MWCNTs, above the percolation threshold, hindered orientation of the polymer chains such that failure occurred before necking during tensile testing, the inclusion of MWCNTs altered the uniaxial deformation behaviour of HDPE. SAXS/WAXS studies on samples post uniaxial drawing revealed that the HDPE and composites of HDPE and MWCNTs developed a highly oriented sheared herringbone lamellar structure. The drawing process also caused surface cavitation and voiding in the composites.

多壁碳纳米管（MWCNT）易于分散并分布在高密度聚乙烯（HDPE）基质中，并获得了非常低的（<0.3 wt％，0.17 vol％）流变渗透阈值。可以看出，该聚合物覆盖了MWCNTs，该MWCNTs作为成核剂并诱导了取向的纳米杂化烤肉串（NHSK）晶体结构，部分是注塑工艺的产物。HDPE的弹性模量和屈服应力随着MWCNTs的添加而增加，但断裂时的聚合物应变在渗透率以下急剧增加，然后在渗透率以上再次降低。超过渗透阈值的MWCNT的添加会阻碍聚合物链的取向，从而在拉伸试验期间在颈缩之前发生破坏，MWCNT的加入改变了HDPE的单轴变形行为。SAXS / WAXS在单轴拉伸后对样品的研究表明，HDPE以及HDPE和MWCNT的复合材料形成了高度取向的剪切人字形层状结构。拉伸过程还引起复合材料的表面气蚀和空洞化。