The application of vibrational spectroscopy to topical problems in qualitative and morphological analysis
The application of vibrational spectroscopy to topical problems in qualitative and morphological analysis
In chapter 1, infrared spectroscopy was used to study hydrogen bonding in a selection of glycol solutions (using CCI4 as the solvent). A particular set of molecular configurations occur in these compounds as a direct result of intramolecular hydrogen bonding and these were implied by the appearance of corresponding bands in the infrared spectra. A trend in the extent of intramolecular bonding was observed along the homologous series, suggesting a maximum interaction in tetraethylene glycol. The effects of solution concentration on the spectrum of octaethylene glycol were also studied. Not only did the extent of intramolecular bonding increase in stronger solutions, but signs of intermolecular effects were also implied. Finally, the effects of water on intramolecular hydrogen bonding were studied. Infrared spectra were recorded of solutions containing different amounts of water. Analysis of the spectra implied that water molecules preferentially interacted with terminal OH groups not already participating in intramolecular bonds and that all other groups were left unaffected.
In chapter 2, various levels of crystallinity and water content in nylon 6,6 were examined, principally using infrared spectroscopy. The uptake and exchange of atmospheric moisture over periods of up to 24 hours was demonstrated. The absorption of water by specimens was found to increase their crystallinity (as quantitatively derived from their infrared spectra). Close attention was paid to this effect through a series of systematic experiments involving the hydration of various materials. Water induced crystallisation was confirmed, but as a practical point, its extent was not as great as normally implied by the spectra.
In chapter 3, polarised FT Raman spectroscopy was used to analyse a sample of ultra-high modulus polyethylene, as produced by die drawing. The high degree of orientation of the sample meant that striking variations in relative band intensities were seen throughout the spectra. These changes were not completely explicable, but an indication of polymer orientation can be gained by the method. (DX191,316)
University of Southampton
1995
Bentley, Phillip Arthur
(1995)
The application of vibrational spectroscopy to topical problems in qualitative and morphological analysis.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
In chapter 1, infrared spectroscopy was used to study hydrogen bonding in a selection of glycol solutions (using CCI4 as the solvent). A particular set of molecular configurations occur in these compounds as a direct result of intramolecular hydrogen bonding and these were implied by the appearance of corresponding bands in the infrared spectra. A trend in the extent of intramolecular bonding was observed along the homologous series, suggesting a maximum interaction in tetraethylene glycol. The effects of solution concentration on the spectrum of octaethylene glycol were also studied. Not only did the extent of intramolecular bonding increase in stronger solutions, but signs of intermolecular effects were also implied. Finally, the effects of water on intramolecular hydrogen bonding were studied. Infrared spectra were recorded of solutions containing different amounts of water. Analysis of the spectra implied that water molecules preferentially interacted with terminal OH groups not already participating in intramolecular bonds and that all other groups were left unaffected.
In chapter 2, various levels of crystallinity and water content in nylon 6,6 were examined, principally using infrared spectroscopy. The uptake and exchange of atmospheric moisture over periods of up to 24 hours was demonstrated. The absorption of water by specimens was found to increase their crystallinity (as quantitatively derived from their infrared spectra). Close attention was paid to this effect through a series of systematic experiments involving the hydration of various materials. Water induced crystallisation was confirmed, but as a practical point, its extent was not as great as normally implied by the spectra.
In chapter 3, polarised FT Raman spectroscopy was used to analyse a sample of ultra-high modulus polyethylene, as produced by die drawing. The high degree of orientation of the sample meant that striking variations in relative band intensities were seen throughout the spectra. These changes were not completely explicable, but an indication of polymer orientation can be gained by the method. (DX191,316)
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Published date: 1995
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Local EPrints ID: 459382
URI: http://eprints.soton.ac.uk/id/eprint/459382
PURE UUID: f68178fd-ee6e-4cf9-8cc6-58daac923f28
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Date deposited: 04 Jul 2022 17:09
Last modified: 04 Jul 2022 17:09
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Author:
Phillip Arthur Bentley
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