الفهرس 
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Abstract
The electric arc furnace dust (EAFD) is a waste material produced during the steelmaking process. It contains large amounts of valuable metal oxides that can be used as a filling additive to improve the polymer properties. In this study, the (EAFD) was added to the unsaturated polyester resin (UP) to prepare five different filled by EAFD weight percentages including 5, 10, 15, 20, 30 wt% EAFD incorporated in the UP matrix. The EAFD particles were characterized by Fourier Transform Infrared (FTIR), X-ray powder Diffraction (XRD) and Scanning Electron Microscope (SEM) to investigate their chemical composition, shape and size. Neat UP and UP composites filled with EAFD were studied mechanically by the tensile test, the charpy impact test, the flexural test and the hardness test. The composites were investigated physically by the conductance of the density test and the water absorption test. The flammability analysis was performed through the Limiting Oxygen Index test (LOI). The thermal properties were determined using Thermogravimetric Analysis (TGA). Also, the magnetic properties were studied by using Vibrating Sample Magnetometer (VSM).
The EAFD samples contained high percentages of iron, zinc and calcium oxides, which are promising components to be used as a filler for a polymer matrix. The flame retardancy of the composites filled EAFD increased up to 32.43% compared to the neat unsaturated polyester. The incorporation of the rigid EAFD particles into the polymer matrix increased the stiffness which improved the mechanical properties significantly. The thermal stability of the composites containing EAFD with different weight percentages, showed a remarkable increasing trend.
It has been proved that using the EAFD as a filler in the UP in different wt% led to preparing UP blends of controllable mechanical and physical characteristic. In addition, it has converted a solid industrial severe pollutant into a useful filler.