Abstract

     This work investigates the impact of the filler (copper powder) on the flame and resistance of bending for unsaturated polyester. The percentages of fillers (0.5%, 0.8%, 1%, 1.5%, 2%, and 2.5%) and a particle size of (150 µm) were investigated by many variables, such as flame and bending resistance. In addition, through optical microscopy, the specimens of the polymer (unsaturated polyester) were measured in a pure state and with the addition of copper powder. Results revealed strong bending resistance of 338 MPa at the percentage of 0%. The added copper powder reduced the spaces within the polymer chains, thereby reflecting the high ability of the polymer to resist the applied stress. The homogeneity is high within the polymer and additives. The findings also indicate decreased bending resistance of 120 MPa at a percentage of 2%. The average burning time starts to show a strong impact at 0%, which then increases at 181Sec. The behavior then begins to increase when the weighed proportions are increased and then continued to increase at (1%) at 190 Sec. The maximum proportions also increased at a copper powder percentage of (2%) at 212 s. Results also indicate that the percentage for the time of burning  ranged within negative and positive values. The negative values at minimum weight ratios of copper powder percentages of 0.5%–0.8% and positive values at great weight ratios of copper powder percentages of 1% and 2%.