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Open AccessArticle

Solid-State Foaming of Acrylonitrile-Butadiene-Styrene/Recycled Polyethylene Terephthalate Using Carbon Dioxide as a Blowing Agent

1
School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwananak-ro, Gwanak-gu, Seoul 151-744, Korea
2
Research Institute of Advanced Materials, Seoul National University, 1 Gwananak-ro, Gwanak-gu, Seoul 151-744, Korea
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(2), 291; https://doi.org/10.3390/polym11020291
Received: 16 January 2019 / Revised: 31 January 2019 / Accepted: 1 February 2019 / Published: 9 February 2019
(This article belongs to the Collection Sustainable Polymeric Materials from Renewable Resources)
In this study, a single paragraph of acrylonitrile-butadiene-styrene (ABS)/recycled polyethylene terephthalate (R-PET) polymeric foams is prepared using CO2 as a blowing agent. First, the sorption kinetics of subcritical and supercritical CO2 are first studied at saturation temperatures from −20 to 40 °C and a pressure of 10 MPa, in order to estimate the diffusion coefficient and the sorption amount. As the sorption temperature increases, the diffusion coefficient of CO2 increases while the sorption amount decreases. Then, a series of two-step solid-state foaming experiments are conducted. In this process, a specimen is saturated with liquid CO2 and foamed by dipping the sample in a high-temperature medium at 60 to 120 °C. The effects of foaming temperature and depressurization rate on the morphology and structure of ABS/R-PET microcellular foams are examined. The mean cell size and the variation of the cell size distribution increases as the foaming temperature and the depressurization rate increases. View Full-Text
Keywords: acrylontrile-butadiene-styrene; recycled polyethylene terephthalate; solid-state foaming; carbon dioxide; microcellular foam; cell size distribution acrylontrile-butadiene-styrene; recycled polyethylene terephthalate; solid-state foaming; carbon dioxide; microcellular foam; cell size distribution
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MDPI and ACS Style

Kwon, D.E.; Park, B.K.; Lee, Y.-W. Solid-State Foaming of Acrylonitrile-Butadiene-Styrene/Recycled Polyethylene Terephthalate Using Carbon Dioxide as a Blowing Agent. Polymers 2019, 11, 291.

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