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Preparation of polyethylene terephthalate foams at different saturation temperatures using dual methods of supercritical batch foaming

  • Polymer, Industrial Chemistry
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Abstract

Polyethylene terephthalate (PET) foams were prepared at different saturation temperatures using two supercritical foaming methods. The average cell size, cell number density, and porosity of PET foams obtained using each foaming method were compared. The crystallinity of the PET samples after the saturation step in the two-step foaming process was measured to observe the CO2-induced crystallization. The crystallinity of PET according to the saturation temperature led to a variation in cell size in the two-step foaming. In contrast, the melting of crystals with the increase in the temperature affected the cell number density of the polymeric foam prepared by one-step foaming method. The influence of the PET crystals on the cell nucleation or cell growth in each foaming method was studied from these results.

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Acknowledgements

This research was supported by the Institute of Engineering Research at Seoul National University and Grant (NRF-2018R1A2 B2008196) from National Research Foundation of Korea funded by Ministry of Science and ICT of Korea government.

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Authors and Affiliations

  1. School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea

    Dong Eui Kwon, Mulugeta G. Aregay & Youn-Woo Lee

  2. School of Chemical and Bio Engineering, Addis Ababa Institute of Technology, King George VI St., P.O. Box 385, Addis Ababa, 1000, Ethiopia

    Mulugeta G. Aregay

  3. Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea

    Byung Kyu Park

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  1. Dong Eui Kwon
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  2. Mulugeta G. Aregay
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  3. Byung Kyu Park
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  4. Youn-Woo Lee
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Correspondence to Byung Kyu Park or Youn-Woo Lee.

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Kwon, D.E., Aregay, M.G., Park, B.K. et al. Preparation of polyethylene terephthalate foams at different saturation temperatures using dual methods of supercritical batch foaming. Korean J. Chem. Eng. 38, 2560–2566 (2021). https://doi.org/10.1007/s11814-021-0889-y

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  • DOI: https://doi.org/10.1007/s11814-021-0889-y

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