화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.22, No.7, 782-787, July, 2014
DOI10.1007/s13233-014-2129-3  Export Citation
Thermal Shrinkage of Chemically Recycled and Virgin Poly(ethylene terephthalate) Blends
Soo Hyun Lee, Tae Hee Han, and Seong Hun Kim†
  • Department of Organic and Nano Engineering, College of Engineering, Hanyang University, Seoul, 133-791, Korea
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Blends of chemically recycled and virgin poly(ethylene terephthalate) (PET) were prepared using a meltblending process. To enhance the physical properties, virgin PET chips were added to the chemically recycled PET in ratios of 20, 40, and 70 wt%. The mechanical and thermal properties, thermal shrinkage, and crystallinity of the blends were investigated. The thermal shrinkage of the blends decreased with increasing chemically recycled PET content. Tensile tests revealed that the tensile strength and elongation at break of the chemically recycled/virgin PET blends were increased by the addition of virgin PET. The melt flow index and melt density of chemically recycled PET were also investigated. The thermal stability of the blends increased as the virgin PET content increased. Their crystallinity depended on the chemically recycled PET content because of the nucleating effect of nanoparticles in that material, such as metal catalysts. The color index of chemically recycled/virgin PET blends showed yellowing by chemically recycled PET.
Keywords:poly(ethylene terephthalate);recycling;chemical recycling;thermal shrinkage.
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