Enhanced mobility and increased gas sorption capacity in thin film and nanoconduit confined polymers |
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Authors: | Jason P Killgore Lakshmi S Kocherlakota René M Overney |
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Institution: | Department of Chemical Engineering, University of Washington, Seattle, Washington 98195 |
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Abstract: | Poly(tert butyl acrylate) (PTBA) is found to exhibit enhanced mobility when spun cast into thin films or impregnated into cylindrical anodic aluminum oxide (AAO) nanoscale pores. In a thin film configuration, the glass transition temperature of 20 nm thick PTBA is found to decrease almost 20 °C compared to the bulk. Consistent with this mobility increase, an increased volume fraction of interphase polymer leads to at least a 2.4 times viscosity reduction when PTBA is impregnated in 100 nm pores versus 200 nm pores. Such increases in mobility result in a 15‐fold increase in CO2 permeability for an AAO confined geometry compared to a bulk film. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 434–441, 2010 |
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Keywords: | Anodic Aluminum Oxide atomic force microscopy (AFM) gas permeation glass transition nanotechnology poly(tert butyl acrylate) thin films |
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