引用本文:
蒋文华, 刘华, 韩世钧. 小分子在高分子膜中无限稀释扩散系数的测定[J]. 物理化学学报,
1999, 15(07): 668-672.
doi:
10.3866/PKU.WHXB19990717
Citation: Jiang Wen-Hua, Liu Hua, Han Shi-Jun. The Measurement of Solute Diffusion Coefficient in Polymers at Infinite Dilution[J]. Acta Physico-Chimica Sinica, 1999, 15(07): 668-672. doi: 10.3866/PKU.WHXB19990717
Citation: Jiang Wen-Hua, Liu Hua, Han Shi-Jun. The Measurement of Solute Diffusion Coefficient in Polymers at Infinite Dilution[J]. Acta Physico-Chimica Sinica, 1999, 15(07): 668-672. doi: 10.3866/PKU.WHXB19990717
English
The Measurement of Solute Diffusion Coefficient in Polymers at Infinite Dilution
Abstract:
Solute diffusion in polymers is studied at infinite dilution of solute by inverse gas chromatography. The diffusion model proposed by Romdhane and Danner is applied in thes study. and the thickness of polymer film in packed column is evaluated using the method proposed by Braun and Guillet. The diffusion coefficients at infinite dilution for CH2Cl2, CHCl3, C2H4Cl2 and CCl4 in polyethylene are determined. It shows that: 1) The smaller is the molecular volume of the solute, the larger is the diffusion coefficient. 2 )The diffusion coefficient increases with temperature.
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Key words:
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Inverse gas chromatography
- / Polymer film
- / Diffusion coefficient
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