This observation suggests that there is a lack of strong bond among fibres and matrix, perhaps NaOH as catalyst resulting in the formation of weak composites. However, it is evident from the analysis of figure that a smooth broken surface is generated following the MAH treatment. This observation indicates a favourable bond among EFB and Kenaf fibers and PLA matrix. The enhancement of mechanical properties in composites is strongly influence on the effective bond among fiber and polymer matrix. Finally, it is worth mentioning that the good wettability features given by the addition of two fibers can limit the void formation at the fiber-polymer interface and result in high stiffness and strength composites, which in turn lead to high impact strength values .