Carbon dioxide, ethylene and water vapor sorption in poly(lactic acid)
authors Oliveira, NS; Goncalves, CM; Coutinho, JAP; Ferreira, A; Dorgan, J; Marrucho, IM
nationality International
journal FLUID PHASE EQUILIBRIA
author keywords sorption; biodegradable polymer; quartz crystal microbalance; poly(lactic acid) (PLA)
keywords METHACRYLATE THIN-FILMS; GAS SORPTION; PACKAGING MATERIALS; GLASSY-POLYMERS
abstract The objective of this work is to study the gas/vapor sorption in poly(lactic acid) (PLA) with a 98:2 (L:D) ratio using a quartz crystal microbalance (QCM). For that purpose, the sorption of carbon dioxide, ethylene and water vapor in poly(lactic acid) (PLA) with a 98:2 (L:D) ratio, in temperature range from 283 to 313 K and up to atmospheric pressure was measured. The measured isotherms indicate that the sorption mechanism is sorbate dependent, since carbon dioxide and ethylene seem to have predominantly a Langmuir type of mechanism while water is predominantly Henry controlled. Two temperature protocols were used and only ethylene sorption is affected by them. Comparisons with previously measured gas sorption data in PLA 80:20 using the same temperature protocol indicate that the L:D ratio plays a dominant role in gas/vapor sorption in PLA. (c) 2006 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0378-3812
year published 2006
volume 250
issue 1-2
beginning page 116
ending page 124
digital object identifier (doi) 10.1016/j.fluid.2006.10.009
web of science category Thermodynamics; Chemistry, Physical; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000243232500014
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journal impact factor 2.838
5 year journal impact factor 2.454
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