Abstract
The objective of this research is studying the influence of sodium carbonate particles on tensile strength properties, hardness shore (D) , impact strength and fracture toughness properties of unsaturated polyester resin reinforced with carbon / chopped glass fiber. The sodium carbonate particles (3%,5%,7% w.f) with (5% w.f) carbon / chopped glass fiber are adding in the unsaturated polyester resin as filler. Specimens were fabricated by hand lay-up technique of pouring unsaturated polyester resin with particles and fiber. The mean particle size analyzers of sodium carbonate (0.71µm).Applications of this study are "Automobile system ,water and fule storge tanks, vessles and industrial supports". The results showed that the impact strength, ultimate tensile strength, fracture toughness and hardness shore D properties enhanced with an increase weight fraction of sodium carbonate particles. The samples reinforced with carbon fiber have better mechanical properties than samples reinforced by chopped glass fiber.
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