Investigation on CO sub(2)-induced plasticization in polycarbonate membrane using positron annihilation lifetime spectroscopy

In this study, the microstructural changes in polycarbonate (PC) membranes induced by the CO sub(2) sorption were investigated using the CO sub(2) sorption isotherm data and the positron annihilation lifetime spectroscopy (PALS). The effects of the PC exposure to CO sub(2) at different temperatures...

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Published inJournal of membrane science Vol. 363; no. 1-2; pp. 302 - 308
Main Authors Lo, Chia-Hao, Hung, Wei-Song, De Guzman, Manuel, Huang, Shu-Hsien, Li, Chi-Lan, Hu, Chien-Chieh, Jean, Yan-Ching, Lee, Kueir-Rarn, Lai, Juin-Yih
Format Journal Article
LanguageEnglish
Published 01.11.2010
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Summary:In this study, the microstructural changes in polycarbonate (PC) membranes induced by the CO sub(2) sorption were investigated using the CO sub(2) sorption isotherm data and the positron annihilation lifetime spectroscopy (PALS). The effects of the PC exposure to CO sub(2) at different temperatures and gas pressures on the free-volume distribution were discussed. The distribution at ambient conditions or 5 atm He pressure displayed a monomodal curve, whereas that at different CO sub(2) pressures showed a bimodal curve, indicating the presence of small and big free-volume sizes due to the serious plasticization caused by CO sub(2).
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ISSN:0376-7388
DOI:10.1016/j.memsci.2010.07.049