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    한국섬유공학회지, Vol.55, No.2, pp. 124-129, 2018
    시아노 기능기를 갖는 전방향족 폴리아조메틴의 합성과 특성분석
    Synthesis and Characterization of Fully Aromatic Polyazomethines with Cyano Functional Group
     
    최영철 · 이상훈 · 김민수 · 류경문 · 이상철 · 정영규
     
    We herein report the preparation and characterization of a new type of fully aromatic polyazomethines (PAMs) with the cyano functional group. For synthesizing this compound, two homopolymers, poly(nitrilo-2-cyano-1,4-phenylenenitrilomethine- 1,3-phenylenemethine) (mPAM) and poly(nitrilo-2-cyano-1,4-phenylenenitrilomethine- 1,4-phenylenemethine) (pPAM) and their copolymers, poly[(nitrilo-2-cyano-1,4- phenylenenitrilomethine-1,4-phenylenemethine)-co-(nitrilo-2-cyano-1,4-phenylenenitrilomethine- 1,3-phenylenemethine)]s (coPAMs), were synthesized via the polycondensation of terephthalaldehyde (TPA), isophthalaldehyde (IPA), and 2-cyano-1,4-phenylenediamine (cyPPD) monomers in an NMP/CaCl2 solvent system. The 1H-NMR and FT-IR spectra confirmed that all the aromatic PAMs were successfully synthesized and that the output compositions of coPAMs were almost identical to the relative input composition of TPA and IPA to cyPPD. mPAM, with a nonlinear meta-phenylene moiety, exhibited good solubility in organic solvents such as NMP, DMSO, and DMAc, while pPAM and coPAMs were partially soluble in those solvents owing to the rigid para-phenylene moiety in the main chains. Accordingly, unlike mPAM, pPAM and coPAMs were semicrystalline, as revealed by their Xray diffraction patterns. Interestingly, the peak decomposition temperatures (667−769 °C) in air were higher than those (452−594 °C) in nitrogen, although the residues (74−81%) at 800 °C in nitrogen were far higher than those (16−47%) in air.
     
    Keywords : Aromatic polyazomethines, Cyano functional group, Characterization, Polycondensation, Thermal stability
    DOI :
     
    Full text(PDF)  시아노 기능기를 갖는 전방향족 폴리아조메틴의 합성과 특성분석