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Different types of long and short multiwalled carbon nanotubes (MWCNTs) were used as structural support in epoxy resin with a percentage of weight (0.1,0.2,0.5,1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5,&5) wt. percent, Utilization of direct mixing processes to prepare Nano-Composites (Epoxy/MWCNTs). The ultrasonic mixing method has been used to disperse the nanotubes into the epoxy resin system. SEM was used to demonstrate the dispersion in the epoxy polymer matrix of different MWCNT concentrations. The findings show that electrical conductivity properties boost effect, thermal conductivity coefficient, and A.C with percentage enhancement of less than 2 percent, and then raising with further raise in the content of MWCNTs.

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In this research, we reported study of quality, sequential and directional layers for three types of fibers are woven perpendicular and random E-glass fiber and carbon chopped fiber effect on the impact and hardness shore (D) using as matrix unsaturated polyester. The composites were prepared by hand lay-up method. The composites constituents were unsaturated polyester using a matrix with 25% volume fractions of Glass Fibers (G.F) as reinforcement and 5% carbon chopped fiber as hybrid fabric composite. The results showed that the nonreinforced unsaturated polyester have lower properties than composites material tests are conducted on these specimens to determine the at maximum load and hardness number using a universal testing machine and hardness shore (D) testing machine. Different behavior was shown for the fiber/polyester composite depending on the type of the fiber. The sample which reinforced three layers fiberglass characterized the highest impact strength of these composites due to high chemical compatibility between reinforced materials (fiber and matrix) base resin polyester.

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