Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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A Study on Fabrication of Polyeser Copolymers(I) -Physical Propertis of PET/PETG Blends-

폴리에스테르 공중합체의 Fabrication 연구(I) - PET/PETG Blends의 물리적 특성 -

  • 이소화 (영남대학교 응용화학공학부) ;
  • 현은재 (영남대학교 응용화학공학부) ;
  • 황성혁 (영남대학교 응용화학공학부) ;
  • 제갈영순 (경일대학교 교양학부) ;
  • 장상희 (구미 1대학 신소재섬유과) ;
  • 김봉식 (영남대학교 응용화학공학부)
  • Published : 1999.10.01

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Abstract

Blends of poly(ethylene terephthalate) (PET) and poly(ethylene terephthalate glycol) (PETG) were prepared on a twin-screw extruder. Blend films were prepared by solid state extrusion on a capillary rheometer, Crystallinity, thermal, dynamic mechanical, rheological, and mechanical properties of these blend films were investigated. PET/PETG blend films exhibited single $T_{g}$ and $T_{m}$ because of the compatibility of PET with PETG. The crystallinity and density of these blend films increased with increasing draw ratio. Storage modulus of PET/PETG blend films increased with increasing draw ratio. The viscosity of PET/PETG blends was lower than that of the parent polymers and exhibited a minimum at the PET/PETG composition of 90/10. The tensile strength of PET/PETG blend films increased with increasing draw ratio but decreased with increasing PETG content.

Keywords

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