Anomalous swelling of molten PCL/ scCO2 solutions

Language
en
Document Type
Article
Issue Date
2014-06-23
Issue Year
2014
Authors
Carbone, Maria Giovanna Pastore
Tammaro, Daniele
De Maio, Attilio
Di Maio, Ernesto
Hankel, Robert
Bräuer, Andreas
Mensitieri, Giuseppe
Editor
Abstract

The swelling behavior of molten poly(ε-caprolactone) in contact with carbon dioxide has been analyzed by using the pendant drop method. At subcritical pressures, the swelling kinetics of the polymer-gas solution follow the typical Fickian diffusion behavior, the volume approaching an equilibrium value after the initial transient. In supercritical conditions, after the first transient, the volume of the solution does not approach an equilibrium value but still, slowly increases. Raman experiments have suggested that this anomalous time-dependent swelling in scCO2 could be due or to slow, secondary diffusion, or to polymer dissolution in scCO2

Journal Title
AIP Conference Proceedings
Volume
1599
Citation
AIP Conference Proceedings 1599 (2014): S. 230-233. 23.06.2014 <http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4876820>
DOI
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