物理化学学报 >> 2000, Vol. 16 >> Issue (04): 345-350.doi: 10.3866/PKU.WHXB20000410

研究论文 上一篇    下一篇

超临界二氧化碳中聚氨酯吸附小分子的影响因素

叶树集, 陈鸣才, 胡红旗, 郭元强   

  1. 中国科学院广州化学研究所,广州 510650
  • 收稿日期:1999-08-27 修回日期:1999-11-23 发布日期:2000-04-15
  • 通讯作者: 陈鸣才

Effects on the Absorption of Small Molecules into Polyurethane in Supercritical Carbon Dioxide

Ye Shu-Ji, Chen Ming-Cai, Hu Hong-Qi, Guo Yuan-Qiang   

  1. Guangzhou Institute of Chemistry,Academia Sinica,Guangzhou 510650
  • Received:1999-08-27 Revised:1999-11-23 Published:2000-04-15
  • Contact: Chen Ming-Cai

摘要:

研究了超临界CO2 中降压时间以及小分子的溶度参数、亲电性和芳香性等因素对聚氨酯吸附小分子的影响,考察了小分子比蒸发速率对小分子在聚氨酯中解吸的影响. 结果表明聚氨酯易于吸附亲电性试剂和多数芳香族小分子. 通常比蒸发速率大的小分子在聚氨酯中解吸也快.

关键词: 超临界CO2, 聚氨酯, 吸附, 影响因素

Abstract:

A systematic study about the absorption of small molecules into polyurethane was undertaken in supercritical carbon dioxide. Changes in mass of PU were given in terms of the changes of factors such as decompression time, solubility parameter, electrophilic and aromatic character of small molecules. The effect of specific evaporation velocity of small molecules on desorption was observed. The results showed that polyurethane is easy to absorb electrophilic and aromatic compounds. The more rapid its specific evaporation velocity is, the faster the small molecule is desorbed.

Key words: Supercritical carbon dioxide, Polyurethane, Absorption, Effect