Water Absorption, Mechanical, and Crystallization Properties of High-density Polyethylene filled with Corncob Powder

Shiliu Zhu, Yong Guo, Daowu Tu, Yuxia Chen, Shengquan Liu, Wei Li, Li Wang
2018 BioResources  
The effect of olive shell flour, Exocarp & Mesocarp, on the mechanical, morphological, and water uptake properties of high density polyethylene (HDPE), with and without using coupling agent, were investigated. In this research, HDPE filled with olive shell flour at 0, 5, 25, and 50 wt. % loading level in the absence and presence of 1% and 5% coupling agent. Environment-friendly composites were fabricated by extrusion and compression molding processing technologies. Tensile strength of the
more » ... rength of the composite decreases with the increase of the filler loading; and increases in the presence of coupling agent. The modulus of elasticity at 5 and 25 wt. % filler showed higher values on the order of 5% compared to that of neat HDPE. The impact strength was increased for low filler loading level (5 wt. %) on the order of 16% and decreased for medium and high filler loading level (25 and 50 wt. %) on the order of 61% and 91% respectively. The interfacial properties of the polymer composites were improved at low filler loading level 5 wt. % and enhanced by the addition of 5 wt. % coupling agent (5F+5C). Morphological illustrations reflect the mechanical behavior findings and the effect of coupling agent on the enhancement of the composite interfacial adhesion. Water uptake of the composite; increased with filler content and decreased in the presence of coupling agent. The results of the study demonstrate that olive shell flour can be used as reinforcement for HDPE bio-composite material
doi:10.15376/biores.13.2.3778-3792 fatcat:jkr2xfnnobg6plvnabm74ah2gq