Investigation the Effects of the Type of Lignocellulosic Materials on the Properties of Kenaf Fiber - Wood Flour / Polypropylene Hybrid Composites

In this study hybrid and non hybrid composites of lignocellulosic materials / polypropylene were mixed in an internal mixer at the five levels of 0 – 100, 25 – 75, 50 – 50, 75 – 25, 100 – 0% which consisted of 30% kenaf fiber / wood flour in weight as well as 3% maleic anhydride as coupling agent and 1% estearic acid as lubricant. The standard samples were prepared by the injection molding. Tensile and flexural properties (strength, modulus and elongation at break), unnotched impact strength, and water absorption were investigated as a function of lignocellulosic materials. Non hybrid composites of kenaf fiber and hybrid composites that consists of higher amount of kenaf fiber show better physical and mechanical properties. scanning electron microscopy (SEM) micrographs of composites show a continuous and homogenous texture by the application of 3% coupling agent which result in a decrease in the vision of kenaf fiber and wood flour out of the polymer texture and a better bond between fibers and polymer. Micrographs confirm the results of the physical and mechanical tests.