| 초록 |
Carbon fiber is a promising material for fabricating light-weight composites in aerospace and defense areas because of its outstanding mechanical properties. Acrylonitrile is normally used as a main monomer to produce PAN precursor polymer for PAN-based carbon fibers. However, PAN homopolymer as the carbon fiber precursor has hardly been used because of its high stabilization temperature, centralized heat release, and poor solubility. Moreover, the mechanical and thermal properties of PAN based-carbon fibers are highly affected by chemical structure and content of comonomer in PAN copolymer. In this study, PAN co- or terpolymers as carbon fiber precursor were successfully synthesized using methyl acrylate (MA), fumaric acid (FA) or maleic acid (MA) as comonomers via stepwise solution polymerization and aqueous suspension polymerization according to the different composition and weight ratio. This research was supported by Korea National University of Transportation in 2021. |
