Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (08): 757-760.doi: 10.3866/PKU.WHXB20010819

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Phase Behavior of Polymer-solvent-supercritical CO2 Ternary System

Cao Wei-Liang;Liu Xin;Zhang Jing-Chang   

  1. College of Science, Beijing University of Chemical Technology, Beijing 100029
  • Received:2001-01-10 Revised:2001-03-28 Published:2001-08-15
  • Contact: Zhang Jing-Chang E-mail:caowl@buct.edu.cn

Abstract: The solubility of polymer-supercritical CO2 binary systems was studied, and the effects of co-solvent on the solubility were discussed. The polymers used in this experiment were from commercial coating resins,and AR toluene and cyclohexane produced domestically were used as co-solvent. The results show that the addition of co-solvent increases the solubility remarkably (see Tab. 1).The high-pressure phase behavior of polymer-solvent-supercritical CO2 ternary systems was also investigated experimentally. The effects of component's character and their concentration on p-T phase diagram were discussed. It was found that as CO2 concentration increases, the diagram changed from L-LV boundary to steeper L-LL boundary. the L-LV boundary was not sensitive to different polymers.

Key words: Solubility, Supercritical CO2, Phase behavior