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This research work investigated the effect of carbonization on the impact strength, water absorption and density of coconut shell/unsaturated polyester composite. A portion of the coconut shell was carbonized at 700 o C in a heat treatment furnace with a soaking time of three hours while the other portion was uncarbonized. The coconut shell was carbonized at 700 o C with a soaking time of three hours, ground and sieved into two particle sizes of 425micron and 1.70micron referred to as fine and coarse samples. Water absorption and impact strength of the developed composites were determined. The 20wt% un-carbonized coarse coconut shell reinforced composite sample absorbed more water while the 10wt% carbonized fine coconut shell composite sample absorbed the least quantity of water. Maximum impact strength was obtained at 30wt. % for fine coconut shell particle reinforced composite sample. This composite can be used in automobile and aerospace industries or applications requiring light weight .

Effect of Carbonization and Particle Size on the Impact Strength and Water Absorption Properties of Coconut Shell /Polyester Composite