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Polymers and supercritical fluids: opportunities for vibrational spectroscopy
Author(s) -
Kazarian Sergei G.
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200208)184:1<215::aid-masy215>3.0.co;2-x
Subject(s) - supercritical fluid , polymer , supercritical carbon dioxide , materials science , spectroscopy , chemical engineering , attenuated total reflection , supercritical fluid chromatography , infrared spectroscopy , organic chemistry , chemistry , composite material , physics , high performance liquid chromatography , quantum mechanics , engineering
Supercritical fluids are used for enhanced processing of polymeric materials. Therefore, there is a need to understand how supercritical fluids interact with polymeric materials and how they may modify many facets of process operations. In situ spectroscopy provides a route for understanding and optimising polymer processing with supercritical fluids. In situ spectroscopy probes interactions between supercritical CO 2 and polymers at a molecular level and provides a fundamental understanding of the origin of the plasticising effect of supercritical carbon dioxide on glassy polymers. The changes in polymers subjected to supercritical fluids have been elucidated via in situ ATR(Attenuated Total Reflectance)‐IR spectroscopy. The key feature of our new approach is the use of a modified diamond ATR accessory to measure spectra of polymers subjected to high‐pressure gas, supercritical fluids or near‐critical water. A variety of novel applications for the use of in situ ATR‐IR spectroscopy to polymers are described.