Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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A Study on the Terpolyamides Based on the Isomorphic-Replacement-Type Copolyamide 66/6T -Effect of Comonomer Structure on the Properties of Terpolyamides-

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

  • Lee, Ju Yong (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Jee, Min Ho (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Lim, Jae Ho (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Lee, Kwang-Sang (Rhodia Korea Co., Ltd.) ;
  • Yu, Yeong-Chool (Rhodia Korea Co., Ltd.) ;
  • Baik, Doo Hyun (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
  • 이주용 (충남대학교 유기소재.섬유시스템공학과) ;
  • 지민호 (충남대학교 유기소재.섬유시스템공학과) ;
  • 임재호 (충남대학교 유기소재.섬유시스템공학과) ;
  • 이광상 (한국로디아(주)) ;
  • 유영출 (한국로디아(주)) ;
  • 백두현 (충남대학교 유기소재.섬유시스템공학과)
  • Received : 2012.11.06
  • Accepted : 2012.12.02
  • Published : 2012.12.31
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Abstract

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 adipamide-co-hexamethylene terephthalamide-co-hexamethylene sebacamide) (PA 66/6T/610) and poly(hexamethylene adipamide-co-hexamethylene terephthalamide-co-hexamethylene isophthalamide) (PA 66/6T/6I), 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 6I 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 ($T_m$), heat of fusion (${\Delta}H_m$), and tensile mechanical performances as well as lower water absorption than those of PA 66/6T/6I. 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 ($T_g$) of PA 66/6T/6I copolymers increased with the increment of the 6I content, which was resulted from the reduced chain mobility due to the rigid aromatic structure of the comonomer.

Keywords

Acknowledgement

Supported by : 한국로디아(주)

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