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Phase equilibrium characteristics of supercritical CO 2 /poly(ethylene terephthalate) binary system
Author(s) -
Li ZhiYi,
Meng TingYu,
Liu XueWu,
Xia YuanJing,
Hu DaPeng
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28323
Subject(s) - supercritical fluid , solubility , materials science , ethylene , thermodynamics , supercritical carbon dioxide , phase (matter) , equation of state , poly ethylene , carbon dioxide , analytical chemistry (journal) , chemistry , organic chemistry , physics , catalysis
The solubility of carbon dioxide in poly (ethylene terephthalate) (PET) at high pressure and elevated temperature conditions was investigated for a better understanding of the phase equilibrium characteristics of supercritical CO 2 /PET binary system and useful data for the process development of the supercritical fluid dyeing. Based on the principle of pressure decaying, a novel experimental apparatus suitable to high pressure and high temperature measurement was established. The solubilities of CO 2 in PET were measured with the apparatus at temperatures of 110, 120, and 130°C and pressures up to 30.0 MPa. The results show that the solubility of CO 2 in PET increases with the increase of pressure and CO 2 density, respectively, at a constant temperature, whereas it decreases with the increase of temperature at a constant pressure. The Sanchez‐Lacombe equation of state (S‐L EOS) was used to correlate the experimental data. The calculated results are in good agreement with the experimental ones. The average absolute relative derivation (AARD) is less than 3.91%. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008