한국섬유공학회지 (Textile Science and Engineering)

  • 제41권6호
  • /
  • Pages.451-457
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  • 2004
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지

용융 시간에 따른 PTT/PET 용융 블렌드의 열적 특성 변화

Changes in the Thermal Properties of PTT/PET Melt Blends with Melting Time

  • 김영호 (숭실대학교 공과대학 섬유공학과) ;
  • 방경 (숭실대학교 공과대학 섬유공학과)
  • Kim Young Ho (Department of Textile Engineering, Soongsil University) ;
  • Pang Kyeong (Department of Textile Engineering, Soongsil University)
  • 발행 : 2004.12.01
⟨ 이전 논문 다음 논문 ⟩

초록

Melt blends of poly(trimethylene terephthalate) (PTT) and poly(ethylene terephthalate) (PET) of various ratios were prepared by mixing at $280^{\circ}C$ for different times using twin screw type internal mixer, and their thermal properties were investigated by DSC, DMA and NMR spectroscopy. With increase in mixing time at $280^{\circ}C$, the two melting peaks of PTT/PET blends, corresponding to the melting of PTT and PET, merged to one peak and moved to lower temperatures, while the crystallization temperature moved to higher temperatures. DMA analysis indicated a single glass transition temperature for the PTT/PET melt blends of various compositions prepared by mixing at $280^{\circ}C$ for 5 minutes, indicating that the blends are completely miscible in the amorphous region. The transesterification reaction in the PTT/PET melt blends was confirmed bi NMR spectroscopic analysis. Degree of randomness and sequence length of the blends were calculated by using $^13C-NMR$ data. The former increased while the latter decreased as the melt mixing time increased.

키워드

참고문헌

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