동형치환형 코폴리아미드 66/6T 기반 터폴리아미드에 대한 연구 -공단량체의 구조가 터폴리아미드의 물성에 미치는 영향

• Published in: 한국섬유공학회지 Vol. 49; no. 6; pp. 383 - 391
• Main Authors: 이주용, Ju Yong Lee, 지민호, Min Ho Jee, 임재호, Jae Ho Lim, 이광상, Kwang Sang Lee, 유영출, Yeong Chool Yu, 백두현, Doo Hyun Baik
• Format: Journal Article
• Language: Korean
• Published: 한국섬유공학회 30.12.2012
• Subjects: isomorphic replacement; mechanical properties; terpolyamide; thermal properties; water absorption; 섬유공학; thermal properties; water absorption; mechanical properties; terpolyamide; isomorphic replacement
• ISSN: 1225-1089; 2288-6419

Two kinds of semi-aromatic polyamide terpolymers based on the isomorphic replacement copolymer system of poly(hexamethylene adipamide-co-hexamethylene terephthalamide) (PA 66/6T), that is, poly(hexamethylene adipa-mide-co-hexamethylene terephthalamide-co-hexamethylene sebacamide)(PA66/6T/610) and poly(hexamethylene adi-pamide-co-hexamethylene terephthalamide-co-hexamethylene isophthalamide) (PA 66/6T/61), were synthesized by melt polycondensation in order to study the effect of comonomer structure on the properties of terpolyamides, Although the incorporation of the 610 or 61 in the PA terpolymers led to overall depression in the thermal properties of terpolymers. PA 66/6T/610 exhibited noticeably higher thermal properties such as melting point (Tm), heat of fusion (△Hm), and tensile mechanical perfoffilances as well as lower water absorption than those of PA 6616T/61. The lower water absorption might be originated from the enhanced chain mobility and the lower density of amide bond owing to the long aliphatic chain of the sebacic acid, On the other hand, the glass transition temperatures (Tg) of PA 66/6T/61 copolymers increased with the increment of the 61 content. Which was resulted from the reduced chain mobility due to the rigid aromatic structure of the comonomer.