▎ 摘　　要

In this article, a comparative study of biaxial stretching at different stretching ratios for melt mixed high-density polyethylene (HDPE)/carbon nanofiller composites containing 4wt% multiwalled carbon nanotubes (MWCNTs), graphene nanoplatelets (GNPs) or carbon black (CB) was conducted in order to investigate the influence of the carbon nanofillers on the processability of the material and on its final properties after processing. It is shown that the addition of carbon nanofillers results in a significant strain hardening behavior upon biaxial stretching, greatly improving the deformation stability and thus processability of the material. The reinforcement effectiveness of the nanofillers in strain hardening behavior is CB