In situ Spectroscopy of Polymers Subjected to Supercritical CO2: Plasticization and Dye Impregnation
- 1 April 1997
- journal article
- research article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 51 (4), 491-494
- https://doi.org/10.1366/0003702971940765
Abstract
In situ FT-IR spectroscopy has been used to study poly(methyl methacrylate) films subjected to high-pressure and supercritical CO2. Spectral changes indicate increased molecular mobility of ester groups due to the plasticization effect of CO2 on PMMA. This increase in PMMA segmental mobility has been used to impregnate Disperse Red 1 dye (DR1) into polymer film from a supercritical fluid solution. The enhanced diffusion process was observed in situ via FT-IR and UV/vis spectroscopy.Keywords
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