Thermoplatic resin/carbon fiber composites are expected to have higher mechanical properties, abrasion resistance and electrical thermal conductivity, and have potential applications in high performance composite materials. In this thesis, the mechanical, thermal, and electrical properties of th...
Thermoplatic resin/carbon fiber composites are expected to have higher mechanical properties, abrasion resistance and electrical thermal conductivity, and have potential applications in high performance composite materials. In this thesis, the mechanical, thermal, and electrical properties of the composite were evaluated depending on the lengths(3 mm, 6 mm) and compositions(5, 10, 20, 30 phr) of chopped carbon fiber(CF) in ethylene vinyl acetate copolymer(EVA) matrix. In addition, the mechanical, thermal, and electrical properties of the composite with carbon nanofiber(CNF) were also evaluated based on their compositions from 1 to 20 phr. The tensile strength and elongation of EVA/CF composites decreased with increasing carbon fiber content, due to the role of carbon fiber as fine defects, which is also shown in SEM images. Flexural, impact strength, and mooney viscosities increased with increasing carbon fiber contents, result from the effective dispersion of the load applied to the thickness direction due to the random distribution of carbon fiber. Electrical conductivity and thermal de composition temperature of the EVA/CF composites were also found to be high because of high thermal and electrical properties of carbon fibers. In the EVA/CNF composites, similar results were obtained except tensile strength, that was increased at the contents of 1 and 3 phr. This may indicates the carbon nanofiber acted as a filler at lower contents. These results may have potential applications in the field expanded of carbon fiber reinforced composite materials.
Thermoplatic resin/carbon fiber composites are expected to have higher mechanical properties, abrasion resistance and electrical thermal conductivity, and have potential applications in high performance composite materials. In this thesis, the mechanical, thermal, and electrical properties of the composite were evaluated depending on the lengths(3 mm, 6 mm) and compositions(5, 10, 20, 30 phr) of chopped carbon fiber(CF) in ethylene vinyl acetate copolymer(EVA) matrix. In addition, the mechanical, thermal, and electrical properties of the composite with carbon nanofiber(CNF) were also evaluated based on their compositions from 1 to 20 phr. The tensile strength and elongation of EVA/CF composites decreased with increasing carbon fiber content, due to the role of carbon fiber as fine defects, which is also shown in SEM images. Flexural, impact strength, and mooney viscosities increased with increasing carbon fiber contents, result from the effective dispersion of the load applied to the thickness direction due to the random distribution of carbon fiber. Electrical conductivity and thermal de composition temperature of the EVA/CF composites were also found to be high because of high thermal and electrical properties of carbon fibers. In the EVA/CNF composites, similar results were obtained except tensile strength, that was increased at the contents of 1 and 3 phr. This may indicates the carbon nanofiber acted as a filler at lower contents. These results may have potential applications in the field expanded of carbon fiber reinforced composite materials.
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