Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effects of Phosphite Compounds on the Thermal Properties of PTT/PET Melt Blends

포스파이트 화합물이 PTT/PET 용융 블렌드의 열적 특성에 미치는 영향

  • Ham, Myong-Jo (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Pang, Kyeong (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Young-Ho (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 함명조 (숭실대학교 유기신소재.파이버공학과) ;
  • 방경 (숭실대학교 유기신소재.파이버공학과) ;
  • 김영호 (숭실대학교 유기신소재.파이버공학과)
  • Published : 2008.02.29
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Abstract

The effects of triphenyl phosphite (TPP) and bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite (BPDP) on the transesterification and thermal properties of poly(trimethylene terephthalate) (PTT) and poly(ethylene terephthalate) (PET) melt blends were investigated. PTT/PET melt blends containing small amount of TPP or BPDP were prepared by mixing them at $280^{\circ}C$ for different times using a twin screw type internal mixer, and their thermal properties were investigated by using a DSC. With addition of phosphite compounds, TPP or BPDP, during the melt blending, the trans esterification reaction was retarded and the melting point depression decreased. TPP was more effective than BPDP in decreasing the transesterification during the melt blending. NMR analysis showed that the randomness of PTT/PET blend containing 1% of TPP prepared at the same melt mixing conditions was much lower than the one without TPP, which confirmed the effectiveness of TPP in suppressing the transesterification reaction of the PTT/PET blends.

Keywords

References

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