| 초록 |
Carbon fiber is promising materials for fabricating light-weight composites in industrial scale because of their outstanding mechanical properties such as high electrical conductivity, low thermal expansion coefficient, high specific strength and stiffness. Acrylonitrile is a main monomer to produce PAN polymer for PAN-based carbon fibers. However, PAN homopolymer has hardly been used as a carbon fiber precursor because it has poor solubility in the spinning solution due to strong intermolecular interactions and many defects such as voids caused by the intense heat release. To overcome these limitations, we introduced some kinds of comonomer such as MA and FA or MA into PAN chains. In this study, poly(acrylonitrile-co-methyl acrylate-co-fumaric acid) or poly(acrylonitrile-co-methyl acrylate-co-maleic acid) containing different content of comonomers were synthesized by aqueous suspension polymerization. The terpolymers were analyzed by FT-IR, NMR, DSC, TGA and Ubbelohde viscometer. |
