物理化学学报 >> 1999, Vol. 15 >> Issue (07): 668-672.doi: 10.3866/PKU.WHXB19990717

研究简报 上一篇    

小分子在高分子膜中无限稀释扩散系数的测定

蒋文华, 刘华, 韩世钧   

  1. 浙江大学化学系，杭州 310027
  • 收稿日期:1998-09-02 修回日期:1999-03-12 发布日期:1999-07-15
  • 通讯作者:

The Measurement of Solute Diffusion Coefficient in Polymers at Infinite Dilution

Jiang Wen-Hua, Liu Hua, Han Shi-Jun   

  1. Department of Chemistry,Zhejiang University,Hangzhou 310027
  • Received:1998-09-02 Revised:1999-03-12 Published:1999-07-15
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关键词: 反相气相色谱, 高分子膜, 扩散系数

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.

Key words: Inverse gas chromatography, Polymer film, Diffusion coefficient