Abstract
In this paper, Tungsten trioxide reinforced poly (lactic acid) (PLA) blend nanocomposites were prepared using twin screw extrusion and injection moulding with different nanofillers concentrations (0.5wt%, 1wt%, 3wt%, and 5wt%) together mixed into a PLA matrix. Mechanical properties such as tensile and flexural properties were investigated. The tensile and flexural results indicate a noticeable enhancement in the mechanical strength of the PLA material. The WO3/PLA nanocomposites were compared with neat PLA to identify the attributes and loading effects on the mechanical behaviour of the nanocomposites. A high content of tungsten led to a brittle, fragile, and inelastic composite, while a lower content resulted in a high elastic modulus and stiffness of the composite. The composites reinforced with 3wt% of WO3 has improved its tensile strength and flexural strength by 30.77% and 41.38% respectively. The extrusion stability and composite molten state were compromised in the presence of high concentration of tungsten while a lower percentage eased processing and injection.
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