| 題名: | Comparisons of the sorption and diffusion of supercritical carbon dioxide into polycarbonate and polysulfone |
| 作者: | Tang, Muoi
Huang, Wei-Heng
Chen, Yan-Ping |
| 貢獻者: | 化材系 |
| 關鍵詞: | sorption
desorption
diffusivity
supercritical carbon dioxide
PC
PSF
FTIR |
| 日期: | 2007 |
| 上傳時間: | 2009-11-09 09:20:26 (UTC+8) |
| 摘要: | Diffusion and interaction of supercritical carbon dioxide (SCCO2) with polycarbonate (PC) and polysulfone (PSF) is investigated in this study. Experiments on the sorption Of SCCO2 at 40 degrees C and 20 MPa into these polymers were carried out. Both the sorption amount of SCCO2 (M,) and the desorption diffusivity (D-d) were determined by employing Fick's diffusion model. The M-s and D-d values for SCCO2 in PC were greater than those in PSF, owing to different interactions of SCCO2 with the polymers in the sorption process. The FTIR spectroscopy results for both polymers showed that CO2 desorbed faster from PSF than from PC. This indicated that the carbonyl group in PC had a stronger interaction with SCCO2 The plasticization effect of SCCO2 on these polymers was also investigated by comparing the DMA measurement results on pure and SCCO2 treated polymers. It is shown that PC had a larger shift in glass transition temperature than that of PSF after the SCCO2 treatment. This implied that there is a greater extent of plasticization on PC. (C) 2007 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers. |
| 關聯: | JOURNAL OF THE CHINESE INSTITUTE OF CHEMICAL ENGINEERS Volume: 38 Issue: 5-6 Pages: 419-424 |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 期刊論文
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