Mechanical properties of bagasse fiber filled polypropylene composites
Abstract
The bagasse is a sugarcane waste generated in high proportions in the agroindustry.
In this study, bagasse fiber has been used as filler in polypropylene (PP)
matrix to develop the composite from polymer and natural fiber. Bagasse fiber
filled polypropylene (PP/BF) composites were prepared by using the Z-blade
mixer at processing temperature of 190°C and a speed of 35rpm with different
filler loading varying between 0% and 15% by weight. Maleic anhydride (MAPP)
coupling agent was used to improve the adhesion between the fiber and PP matrix.
The effect of coupling agent addition and fiber content on properties of PP/BF
composites was studied. Tensile strength and elongation at break increased with
increasing filler content while modulus of elasticity decreased for both coupled
and uncoupled PP/BF composite. The addition of bagasse fiber in PP has
decreased the flexural strength and flexural modulus for both coupled and
uncoupled PP/BF composites. However, coupled PP/BF composites showed
greater flexural properties compared to uncoupled PP/BF composites. Based on
swelling behaviour, it can be observed that the coupled PP/BF composites showed
lower water absorption rate compared to the uncoupled one. The presence of
MAPP as coupling agent resulted in decreased water absorption level and
enhanced mechanical properties for PP/BF composites.