In-situ spectroscopy of polymers processed with supercritical carbon dioxide

Sergei G. Kazarian; Christopher J. Lawrence; Brian J. Briscoe

doi:10.1117/12.375295

28 December 1999 In-situ spectroscopy of polymers processed with supercritical carbon dioxide

Sergei G. Kazarian, Christopher J. Lawrence, Brian J. Briscoe

Proceedings Volume 4060, New Trends in Atomic and Molecular Spectroscopy; (1999) https://doi.org/10.1117/12.375295
Event: New Trends in Atomic and Molecular Spectroscopy, 1999, none, Russian Federation

Abstract

Supercritical CO₂ can induce crystallization of amorphous polymers. Molecular level insight into the microstructures of CO₂-processed polymers is needed to form a basis for utilization and optimization of supercritical fluid processing of polymeric materials. Spectroscopy is an economic tool to probe interactions at a molecular level. This understanding will help engineers to utilize molecular level information for improving macroscopic properties of polymeric materials by supercritical fluid processing. FT-IR spectroscopy has been applied to elucidate the morphology and microstructure of polymers processed with supercritical CO₂. FTIR spectra of syndiotactic polystyrene show an increased degree of crystallinity after being subjected to scCO₂. The various crystalline forms induced by CO₂ in syndiotactic polystyrene were characterized via FTIR spectra. FTIR spectroscopy has been also used to measure the kinetics of CO₂-induced crystallization in these polymers.

Citation Download Citation

Sergei G. Kazarian, Christopher J. Lawrence, and Brian J. Briscoe "In-situ spectroscopy of polymers processed with supercritical carbon dioxide", Proc. SPIE 4060, New Trends in Atomic and Molecular Spectroscopy, (28 December 1999); https://doi.org/10.1117/12.375295

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