完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | CHEN, DS | en_US |
dc.contributor.author | HSIUE, GH | en_US |
dc.contributor.author | HSU, CS | en_US |
dc.date.accessioned | 2014-12-08T15:05:10Z | - |
dc.date.available | 2014-12-08T15:05:10Z | - |
dc.date.issued | 1991-09-01 | en_US |
dc.identifier.issn | 0025-116X | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/3693 | - |
dc.description.abstract | A membrane was prepared by sandwiching the side-chain liquid-crystalline polysiloxane (LCP) 3 between two porous poly(propylene) (Celgard) films. Permeation properties for H-2, O2, N2, CH4 and CO2 through the side-chain LCP-based membrane was measured using a gas-chromatographic method at several different temperatures corresponding to the different states of of the side-chain LCP. The gas permeation behaviour depends strongly on the different states of the side-chain LCP. The plots of permeability versus reciprocal temperature show an abrupt change of the slope in the vicinity of the glass transition temperature (T(g)) of the side-chain LCP for all five gases. The activation energy for permeation obtained at these different states exhibits different values. The value obtained in the liquid-crystalline state is the highest. Separation factors (P(O2)/P(N2)) and (P(CO2)/P(CH4)) exhibit an unusual behaviour when the temperature changes across T(g). They increase abruptly when the temperature increases and the phase changes from the glassy state to the liquid-crystalline state of the side-chain LCP. The fact that both permeability and selectivity increases with increasing temperature above the glass transition is attributed to the supermolecular arrangement of the liquid-crystalline state of the side-chain LCP. | en_US |
dc.language.iso | en_US | en_US |
dc.title | GAS PERMEATION THROUGH A SIDE-CHAIN LIQUID-CRYSTALLINE POLYSILOXANE-BASED MEMBRANE | en_US |
dc.type | Article | en_US |
dc.identifier.journal | MAKROMOLEKULARE CHEMIE-MACROMOLECULAR CHEMISTRY AND PHYSICS | en_US |
dc.citation.volume | 192 | en_US |
dc.citation.issue | 9 | en_US |
dc.citation.spage | 2021 | en_US |
dc.citation.epage | 2029 | en_US |
dc.contributor.department | 應用化學系 | zh_TW |
dc.contributor.department | Department of Applied Chemistry | en_US |
dc.identifier.wosnumber | WOS:A1991GJ91300011 | - |
dc.citation.woscount | 18 | - |
顯示於類別: | 期刊論文 |