Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Effect of Comonomers on the Suppression of Crystallization and Molecular Orientation of Poly(ethylene terethphalte) Fibers(I) -In the Case of Aromati Isophthalic Acid and Aliphatic Diethylene Glycol-

공중합이 폴리에틸렌테레프탈레이트 섬유의 결정화 및 분자배향에 미치는 영향(I) -방향족 isophthalic acid와 지방족 diethylene glycol의 경우-

  • 민병길 (금오공과대학 신소재시스템공학부) ;
  • 이상철 (금오공과대학 신소재시스템공학부) ;
  • 윤관한 (금오공과대학 신소재시스템공학부)
  • Published : 2001.05.01

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Abstract

Effect of modification of poly(ethylene terephthalate) (PET) on the high-speed spinning of PET-SDY or PET-POY was investigated. PET and its copolymers having 3-10 mol% of aromatic isophthalic acid (IPA) or aliphatic diethylene glycol (DEG) were prepared by melt polycondensation to compare the effect of aromatic or aliphatic structure of the comonomers on the crystallization and molecular orientation of the PET fibers. The copolymers having DEG showed lower $T_{g}$ than those having IPA on the basis of same comonomer content though the $T_{m}$ depression of PET by incorporation of the comonomers was similar. It was observed that aromatic IPA was more effective in lowering the rate of crystallization and crystallinity of PET than aliphatic DEG. On the other hand, they showed similar effect in suppression of molecular orientation of the PET fibers. Conclusively, aromatic comonomer seemed to be more effective for the high-speed spinning of PET-SDY, but both of the comonomers were effective for the high-speed spinning of PET-POY.

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References

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