Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time

碩士 === 元智大學 === 化學工程研究所 === 89 === The physical aging in the poly[1-(tri- methylsilyl)-1-propyne] (PTMSP) membranes prepared with various casting solvents were studied. It has been observed that the specific volume of the membranes and the permeabilities of gases through the membranes decayed with t...

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Main Authors: Jiann-Jyh Wang, 王建智
Other Authors: Yi-Ming Sun
Format: Others
Language:zh-TW
Published: 2001
Online Access:http://ndltd.ncl.edu.tw/handle/41740441699527767959
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spelling ndltd-TW-089YZU000630482015-10-13T12:14:43Z http://ndltd.ncl.edu.tw/handle/41740441699527767959 Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time 製膜溶劑對聚(1-三甲基矽烷-1-丙炔)膜之氣體滲透性隨時間下降行為的影響 Jiann-Jyh Wang 王建智 碩士 元智大學 化學工程研究所 89 The physical aging in the poly[1-(tri- methylsilyl)-1-propyne] (PTMSP) membranes prepared with various casting solvents were studied. It has been observed that the specific volume of the membranes and the permeabilities of gases through the membranes decayed with time. The bulk and pycnometric density of the membranes increased with time due to the microstructure change of the polymer membranes. However, the increasing rate of the membrane pycnometric density was higher than that of the membrane bulk density, resulting from an inner rearrangement of distribution of free volume and a greater reduction rate of the interstitial free volume. PTMSP membranes prepared by different casting solvents showed different changing rates of permeability and specific volume, but the decay rate constant of the permeability (kp) is proportional to the decay rate constant of the specific pycnometric volume (kv). It is shown that the changing rates of the membrane density and permeability increased with thermal treating temperature. The aging results obtained at the elevated temperatures were consistent with those at room temperature. After treating the aged membranes with a solvent vapor, decayed membrane permeabilities could be partially recovered. Yi-Ming Sun 孫一明 2001 學位論文 ; thesis 85 zh-TW
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language zh-TW
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sources NDLTD
description 碩士 === 元智大學 === 化學工程研究所 === 89 === The physical aging in the poly[1-(tri- methylsilyl)-1-propyne] (PTMSP) membranes prepared with various casting solvents were studied. It has been observed that the specific volume of the membranes and the permeabilities of gases through the membranes decayed with time. The bulk and pycnometric density of the membranes increased with time due to the microstructure change of the polymer membranes. However, the increasing rate of the membrane pycnometric density was higher than that of the membrane bulk density, resulting from an inner rearrangement of distribution of free volume and a greater reduction rate of the interstitial free volume. PTMSP membranes prepared by different casting solvents showed different changing rates of permeability and specific volume, but the decay rate constant of the permeability (kp) is proportional to the decay rate constant of the specific pycnometric volume (kv). It is shown that the changing rates of the membrane density and permeability increased with thermal treating temperature. The aging results obtained at the elevated temperatures were consistent with those at room temperature. After treating the aged membranes with a solvent vapor, decayed membrane permeabilities could be partially recovered.
author2 Yi-Ming Sun
author_facet Yi-Ming Sun
Jiann-Jyh Wang
王建智
author Jiann-Jyh Wang
王建智
spellingShingle Jiann-Jyh Wang
王建智
Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
author_sort Jiann-Jyh Wang
title Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
title_short Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
title_full Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
title_fullStr Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
title_full_unstemmed Influence of the Casting Solvent on the Gas Permeability Decay of Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) Membranes with Time
title_sort influence of the casting solvent on the gas permeability decay of poly[1-(trimethylsilyl)-1-propyne] (ptmsp) membranes with time
publishDate 2001
url http://ndltd.ncl.edu.tw/handle/41740441699527767959
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