Mohammed, A.J., Sweah, Z.J. and Falih, I.Q. 2021. Bending resistance properties and combustion retardant for unsaturated polyester reinforced with copper powder. University of Aden Journal of Natural and Applied Sciences. 25, 1 (Apr. 2021), 197–207. DOI:https://doi.org/10.47372/uajnas.2021.n1.a17.