EFFECT OF PARTICLE SIZE ON TENSILE PROPERTIES AND DENSITY OF DELONIX REGIA SEED PARTICLES FILLED UNSATURATED POLYESTER RESIN COMPOSITES
This study was aimed at examining the effect of particle size on the tensile properties and density of Delonix regia seed particles (DSP) filled unsaturated polyester resin (UPR) composites. The composites were fabricated using a glass mould via hand mixing, and the average DSP particle sizes of 100, 200, 300, 400, and 500 µm were used at 12 % filler loading. The effect of particle size on the tensile properties and density of DSP-filled unsaturated polyester resin was investigated. The results showed a decrease in tensile strength, tensile modulus, elongation at break, and density as the filler particle size increased. The smallest particle size (100 µm) has the highest values of tensile strength, tensile modulus, elongation at break (%) and density with the corresponding values of 35.43 MPa, 0.47 GPa, 7.09% and 1.22 g/cm3 and the largest particle size (500 µm) with values of 15.25 MPa, 0.28 GPa, 5.17% and 1.12 g/cm3 respectively.