This article presents the preparation and characterization of bagasse/high density polyethylene (HDPE)
composites. The effects of multi-walled carbon nanotubes (MWCNTs), as reinforcing agent, on the
mechanical and physical properties were also investigated. In order to increase the interphase adhesion,
maleic anhydride grafted polyethylene (MAPE) was added as a coupling agent to all the composites
studied. In the sample preparation, MWCNTs and MAPE contents were used as variable factors. The morphology
of the specimens was characterized using scanning electron microscopy (SEM) technique. The
results of strength measurement indicated that when 1.5 wt% MWCNTs were added, tensile and flexural
properties reached their maximum values. At high level of MWCNTs loading (3 or 4 wt%), increased
population of MWCNTs lead to agglomeration and stress transfer gets blocked. The addition of MWCNTs
filler slightly decreased the impact strength of composites. Both mechanical and physical properties
were improved when 4 wt% MAPE was applied. SEM micrographs also showed that the surface roughness