Polymerization of Polyacrylonitrile (PAN) Copolymers Containing Methyl acrylate (MA) and Itaconic acid (IA) as comonomer for PAN Carbon Fiber Precursor
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초록
내용
Carbon fiber has excellent specific strength, elastic modulus, thermal and chemical resistance. Due to these advantages, carbon fiber has been extensively applied in high-tech fields such as aerospace, defense areas, and civil engineering as reinforcing material. However, PAN homopolymer has hardly been used because it has poor processability and mechanical properties. Moreover, PAN carbon fibers are highly affected by the method of polymerization, chemical structure of comonomer, and its content. Therefore, acidic or neutral comonomers have been used to improve processability and mechanical properties. In this study, poly(acrylonitrile-co-methyl acrylate-co-itaconic acid) terpolymer containing different contents of comonomers were synthesized by water-based and solution polymerization. The characteristics of PAN copolymers with different weigh ratio of comonomers were characterized by NMR, FT-IR, DSC, GPC, XRD and viscometer.