Premium
Effect of high pressure carbon dioxide on the solubility and diffusivity of dichloromethane in polyetherimide
Author(s) -
Law Yuk Yu,
Balashova Ida M.,
Danner Ronald P.
Publication year - 2009
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.30766
Subject(s) - polyetherimide , dichloromethane , solubility , thermal diffusivity , solvent , carbon dioxide , polymer , diffusion , materials science , hildebrand solubility parameter , chemical engineering , chemistry , polymer chemistry , chromatography , organic chemistry , thermodynamics , physics , engineering
The high pressure inverse gas chromatography technique was used to study the effect of carbon dioxide on the solubility and diffusivity of dichloromethane in polyetherimide. CO 2 was used as the carrier gas with pressures from 0.7 to 3.5 MPa and temperatures between 100 and 175°C. Similar data were obtained for the dichloromethane‐polyetherimide system using helium as the inert carrier gas. As a result of less favorable thermodynamic interactions between the polymer and solvent, the solubility of the dichloromethane was found to be decreased appreciably in the presence of CO 2 . The increased free volume in the polymer provided by the dissolved CO 2 significantly increased the diffusion coefficient. When the temperature was increased the solubility was decreased while the diffusivity was increased. These behaviors have the potential to considerably improve devolatilization processes. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom