Abstract
Commercially available carbon fibers possess high tensile strength (3–7GPa), high tensile modulus (200–935GPa), compressive strength (1–3GPa), and compressive modulus (100–300GPa), as well as low density (1.75–2.20g/cm3). As a result of these properties, carbon fibers are useful reinforcements in composite materials. Precursors for the production of carbon fiber include polyacrylonitrile (PAN), isotropic pitch, mesophase pitch, and regenerated cellulose, among others. Pitch-based carbon fibers may possess tensile modulus as high as 935GPa, with the highest strength PAN-based carbon fibers possessing a tensile strength of 7GPa. Continued development of carbon fibers will drive the usage of these reinforcement materials as the need for lightweight, high-performance materials increases.
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