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Title: Aging and carbon dioxide plasticization of thin polyetherimide films
Authors: Xia, J.
Chung, T.-S. 
Li, P.
Horn, N.R.
Paul, D.R.
Keywords: Gas permeation
Physical aging
Issue Date: 25-Apr-2012
Citation: Xia, J., Chung, T.-S., Li, P., Horn, N.R., Paul, D.R. (2012-04-25). Aging and carbon dioxide plasticization of thin polyetherimide films. Polymer 53 (10) : 2099-2108. ScholarBank@NUS Repository.
Abstract: Industrial gas separation membranes have selective dense layers with thicknesses around 100 nm. It has long been assumed that these thin layers have the same properties as thick (bulk) films. However, recent research has shown that thin films with such thickness experience accelerated physical aging relative to bulk films and, thus, their permeation properties can differ significantly from the bulk. Thin films made from Extem® XH 1015, a new commercial polyetherimide, have been investigated by monitoring their gas permeability. The permeability of the thin films is originally greater than the thick films but eventually decreases well below the permeability of the thick film. The CO 2 plasticization of Extem thin films is explored using a series of exposure protocols that indicate CO 2 plasticization is a function of film thickness, aging time, exposure time, pressure and prior history. © 2012 Elsevier Inc. All rights reserved.
Source Title: Polymer
ISSN: 00323861
DOI: 10.1016/j.polymer.2012.03.009
Appears in Collections:Staff Publications

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