Novel aromatic polyamide-ester copolymers were prepared from new aromatic diamine monomers and terephthaloyl chloride by the low temperature solution polycondensation in N,N-dimethyl acetamide, and then the optimum condition of polymerization was investigated. Molecular structures of synthesized monomers and polymers were identified by means of IR, ¹H NMR and elementary analysis. According to the DSC, DTA and TGA thermograms, the polymers had good thermal stability with the initial decomposition temperature of above 500℃. In the X-ray diffraction patterns, the angles of major diffraction intensities were similar to those of wholly aromatic polyamide such as poly(p-phenyleneterephthalamide), and their appearances exhibited that the polymers had high degree of crystallinity. Also, the polymers could not be dissolved in tertiary amide solvents alone but well dissolved in tertiary amide solvents containing the alkali metal salts.

새로운 방향족 디아민과 테레프탈산클로리드를 저온용액 중축합하여 일련의 새로운 방향족 공중합 폴리아미드-에스테르를 합성하고 또한 그것의 최적 중합조건을 규명하였다. 합성된 단량체 및 중합체들은 적외선 분광분석, 핵자기공명 분광분석과 원소분석을 통해 그 구조를 확인하였다. 열분석에 따르면 그 중합체들은 500℃ 이상의 초기분해온도를 갖는 매우 우수한 안정성을 나타냈다. X-선회절분석에 의하면 이 중합체들은 전방향족 폴리아미드와 유사한 결정패턴을 나타냈으며 알카리금속염을 함유하는 제3급 아미드 용매에 잘 용해되었다.

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