동형치환형 코폴리아미드 66/6T 기반 터폴리아미드에 대한 연구 -공단량체의 구조가 터폴리아미드의 물성에 미치는 영향- = A Study on the Terpolyamides Based on the Isomorphic-Replacement-Type Copolyamide 66/6T -Effect of Comonomer Structure on the Properties of Terpolyamides-

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 홍명웅, "최신 엔지니어링 플라스틱 편람" 기전연구사 21-45, 2007

2 최기대, "엔지니어링 플라스틱 기술동향" 20 (20): 3-7, 2009

3 "http://www2.dupont.com/Plastics/en_US/Products/Zytel_HTN/Zytel_HTN_.html"

4 A. Siciliano, "Thermal and Mechanical Behavior of Polyamide 6/ polyamide 6I/6T Blends" 60 : 1757-1764, 1996

5 O. B. Edgar, "The p-Phenylene Lonkage in Linear High Polymers: Some Structure-Property Relationships" 8 (8): 1-22, 1951

6 E. D. Harvey, "The Melting and Crystallization of Copolymers of Nylon 6,6 and Nylon 6,10 with Poly (hexamethylene terephthalamide) (Nylon-6T)" 12 : 711-716, 1971

7 M. Liu, "Synthesis and Thermal Decomposition of Poly(dodecamethyleneterephthalamide)" 122 : 3369-3376, 2011

8 L. T. Lim, "Sorption and Transport of Water Vapor in Nylon 6,6 Film" 71 : 197-206, 1999

9 이승조, "Polyamide 수지" 1 (1): 134-145, 1990

10 M. Alauddin, "Plastics and Their Machining: a Review" 54 : 40-46, 1995

11 M. I. Kohan, "Nylon Plastics" John Wiley & Sons 90-99, 1973

12 T. S. Ellis, "Miscibility and Immiscibility of Polyamide Blends" 22 : 742-754, 1989

13 A. J. Yu, "Isomorphous Replacement in Copolyamide Systems. Homologs of Adipic and Terphthalic Acid" 81 : 5361-5365,

14 D. L. Pavia, "Introduction to Spectroscopy" Books/Cole 2009

15 J. I. Iribarren, "Handbook of Engineering and Specialty Thermoplastics (Nylons)" Wiley 43-77, 2012

16 K. H. Lee, "Fine Structure and Physical Properties of Nylon Tire Cord with Pepeated Extension Fatigue" 34 (34): 489-495, 1997

17 W. Z. Wang, "Environment-Friendly Synthesis of Long Chain Semiaromatic Polyamides with High Heat Resistance" 114 : 2036-2042, 2009

18 C. C. Pai, "Effect of Moisture on Thermal and Mechanical Propertiesof Nylon-6,6" 9 : 157-163, 1989

19 A. Demaid, "Classification of Plastics Materials" 10 : 9-20, 1996