Title: Carbon Fibers Derived From Mesophase Pitch: Effect of Axial Crystallite Size and Properties
Authors: Victor Bermudez and Amod A. Ogale
Abstract: Mesophase pitch (MP) offers an interesting potential as an inexpensive precursor of carbon fibers with remarkable axial modulus and electrical and thermal conductivities. Their tensile and compressive strength must be improved before use in structural applications is technically feasible. With that aim, the present work investigates the relationship between axial crystallite size and properties resulting from different drawdown ratios (DDRs) during melt spinning. A synthetic, naphthalene-based ARMP was spun through ultrafine-diameter spinnerets into precursor fibers, which were converted to carbon fibers following stabilization and high temperature treatment at 2100 °C. Raman spectroscopy of the carbon fibers revealed a negative correlation between crystallite size along the fiber axis and DDR, while scanning electron microscopy of their longitudinal surface revealed an increasing fibril thickness with decreasing DDR, which has not been reported in prior literature studies. Ongoing work will investigate the effect of these microstructural features on mechanical properties of carbon fibers.
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Conference: SAMPE 2019 - Charlotte, NC
Publication Date: 2019/05/20
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