Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2003.07.006
Title: The accelerated CO2 plasticization of ultra-thin polyimide films and the effect of surface chemical cross-linking on plasticization and physical aging
Authors: Zhou, C.
Chung, T.-S. 
Wang, R.
Liu, Y.
Goh, S.H. 
Keywords: Cross-linking modification
Gas separation
Physical aging
Plasticization
Ultra-thin polyimide film
Issue Date: 1-Nov-2003
Source: Zhou, C., Chung, T.-S., Wang, R., Liu, Y., Goh, S.H. (2003-11-01). The accelerated CO2 plasticization of ultra-thin polyimide films and the effect of surface chemical cross-linking on plasticization and physical aging. Journal of Membrane Science 225 (1-2) : 125-134. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2003.07.006
Abstract: For the first time, the permeation experiments of CO2 are carried out on ultra-thin dense polyimide films (0.5-1.8μm). The observation of accelerated CO2 plasticization indicates that the conventionally defined "plasticization pressure" as an inherent material properties measured from thick dense films is strongly thickness dependent. This accelerated plasticization phenomenon observed in ultra-thin dense films is probably attributed to two factors: (1) the swelling and softening effects of the sorbing CO2 molecules on the polymer chains; and (2) weak micro-mechanical properties and less sorption capacity of ultra-thin films to accommodate the sorbed CO2 molecules. Experimental results suggest that chemically modified ultra-thin films show characteristics of retarded aging process and significantly suppressed plasticization. © 2003 Elsevier B.V. All rights reserved.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/92414
ISSN: 03767388
DOI: 10.1016/j.memsci.2003.07.006
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