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In this study, transverse compressive properties of high tensile strength polyacrylonitrile (PAN)-based (T1000GB), high modulus PAN-based (M60JB), high modulus pitch-based (K13D), and high ductility pitch-based (XN-05) single carbon fibers were measured using a direct compression test. The transverse compressive modulus, Ef (TC), of T1000GB, M60JB, K13D, and XN-05 single fibers corresponded to 8.94 GPa,...
Wide angle X-Ray scattering was used to measure the progression of alignment when stretching carbon nanotube (CNT) sheets. The nanotubes were grown by an aerogel chemical vapor deposition process and drawn onto a drum rotating at a draw rate of 15 m/min to form a sheet. Samples were cut from this sheet at 0°, 10°, 25°, 45° and 90° with respect to the drawing direction. Samples stretched along the...
The effect of polyimide coatings on the filament tensile strength of high-strength polyacrylonitrile-based carbon fiber was studied by using dip and high-temperature vapor deposition polymerization (VDP) coating processes. Unlike a VDP on a cold substrate, high-temperature VDP has the potential to directly synthesize and isotropically deposit a polyimide, from diamine and dihydride monomers without...
The thermal conductivities of ultrahigh tensile strength polyacrylonitrile (PAN)-based (T1000GB) and ultrahigh modulus pitch-based (K13D) carbon fibers with carbon nanotubes (CNTs) grown on them using chemical vapor deposition were measured using a thermal diffusivity meter. The thermal conductivities of the resulting hybrid materials were calculated to be 18.6±1.7 and 965.6±30.0W/mK for T1000GB and...
The tensile properties and fracture behavior of ultrahigh tensile strength PAN-based (T1000GB), ultrahigh modulus pitch-based (K13D) and high ductility pitch-based (XN-05) carbon fibers have been investigated. The statistical distributions of the tensile strength were characterized. The Weibull modulus for the T1000GB, K13D and XN-05 fibers were calculated to be 5.9, 4.2 and 7.9, respectively. The...
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