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Received April 26, 2021
Accepted July 1, 2021
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Preparation of polyethylene terephthalate foams at different saturation temperatures using dual methods of supercritical batch foaming
1School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea 2School of Chemical and Bio Engineering, Addis Ababa Institute of Technology, King George VI St., P.O. Box 385, Addis Ababa 1000, Ethiopia 3Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
bkpark@snu.ac.kr
Korean Journal of Chemical Engineering, December 2021, 38(12), 2560-2566(7), 10.1007/s11814-021-0889-y
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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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References
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