Journal
POLYMER
Volume 53, Issue 3, Pages 776-781Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2011.12.052
Keywords
Anomalous transport; Case II transport; X-ray computed tomography
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Funding
- National Science Foundation
- Department of Defense
- Pratt Trust
- Division Of Earth Sciences
- Directorate For Geosciences [0948842] Funding Source: National Science Foundation
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High-resolution X-ray computed tomography, a completely non-destructive technique that can be used to visualize features in the interior of opaque solids, was successfully adapted in a novel manner to examine the transport dynamics of methanol into glassy poly(methyl methacrylate) discs synthesized by an iniferter-mediated free radical polymerization. In addition to tracking methanol absorption and dimensional swelling, the time-dependent concentration profiles within the polymer disc were determined with higher resolution, lower scanning times, and no major geometry restrictions compared to previous state-of-the-art techniques. These profiles indicated non-Fickian transport behavior with sharp penetrant fronts and deviations from previously reported swelling profiles. (C) 2012 Elsevier Ltd. All rights reserved.
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