Mechanical Properties Of Wood Plastic Composite (WPC) Made Of Recycled High Density Polyethylene (HDPE) And Recycled Wood Flour (RWF)

Nantha, Muniandy (2008) Mechanical Properties Of Wood Plastic Composite (WPC) Made Of Recycled High Density Polyethylene (HDPE) And Recycled Wood Flour (RWF). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The goal of our research was to value add the waste material, to compare the mechanical properties and to find the best optimum ratio between the PE and wood flour. In this study, Wood Plastic Composite (WPC) fabricated using virgin material and post-consumer high density polyethylene (PE) and wood flour using a twin-screw extruder and hot compression machine. The tests of composite based on wood flour at three different ratio filler content, 20%, 30% and 40%, were carried out using universal tensile machine and impact tester according to ASTM D 3039, ASTM D 790 and ASTM D 6110 respectively and their result were presented. To improve the interfacial adhesion between the wood fiber and the HDPE, silane was used in same quantity level as modifiers to treat wood fiber and the results are presented. The experiment results showed that tensile and flexural properties of the composite increased with the increase of the wood flour particles. This result is totally opposite for the impact test. The effects of different material used and wood fiber length on the mechanical properties of WPC were investigated and presented. Tensile fracture surfaces of tested WPC samples were examined by using SEM and the fracture mechanism of WPC was also analyzed in this research. From the research done we identified that the better tensile strength is (19.24 MPa) for recycled WPC, flexural strength (50.75 MPa) for non-recycled WPC and impact energy is (1.45 KJ/m2) for recycled WPC. As a conclusion regarding the mechanical properties, it is shown that 30% is the optimal filler content for both type of WPC. As overall observation the result shows that recycled WPC has better mechanical properties compared to non-recycled WPC.

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