Abstract: High density ployethylene (PE-HI) composites filled with microcrystalline cellulose (MCC) were prepared by melt blending. The effects of MCC content on the mechanical property, rheological behavior, heat distortion temperature and surface morphology were studied. It showed that MCC improve the mechanical properties and the heat distortion temperature. The optical content of MCC was found as 60 %, which resulted in a uniform dispersion of MCC in PE-HD matrix.

Key words: microcrystalline cellulose, high density polyethylene, Mechanical Properties, rheological behavior, composite