King Shie-gao, Li Huei-ming, Fu Shiu-chen. STRUCTURAL IDENTIFICATION METHOD OF AROMATIC POLYAMIDE FIBER[J]. Acta Polymerica Sinica, 1979,(2):65-73.DOI:
The relationship between IR characteristic band and the structure of poly (p-benzamide) -(Ⅰ) and poly (p-phenylene terephthalamide)-(Ⅱ) has been studied. We have indicated the differences between (Ⅰ) and (Ⅱ). The oriented state of film (Ⅱ) has been observed by IE dichroism. The chemical analysis method has been improved. Terephthalic acid and terephthalic amine separated from the hydrolyzate were obained and identified respectively. In such way we are sure that Kevlar-49 fiber has the structure of (Ⅱ). Using DTA method