Journal Article10.1021/MA961035F
Fourier Transform Infrared Spectroscopy Study on Effects of Temperature on Hydrogen Bonding in Amine-Containing Polyurethanes and Poly(urethane−urea)s
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TL;DR: In this article, the hydrogen bonding in hard and soft segments was examined for the extent of phase separation, and the microstructure was evidenced by differential scanning calorimetry (DSC).
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Abstract: Three types of amine-containing polyurethanes and poly(urethane−ureas), N-methyldiethanolamine (MDEA) and/or tetraethylenepentamine (TEPA) as the chain extender and poly(ethylene glycol) of MW 400 as the soft-segment component, have been studied by FTIR. The hydrogen bonding in hard and soft segments was examined for the extent of phase separation, and the microstructure was evidenced by differential scanning calorimetry (DSC). The temperature effects on the hydrogen bonding were also investigated. They show a significant amount of hydrogen bonding between the hard and soft segments. It indicates that there exists a large amount of partial phase mixing of hard and soft segments compared to the conventional polyurethanes. The bulky CH3 groups of MDEA in hard segments restrict the hydrogen bonding within the hard segments, while the TEPA-containing urethane−urea polymers have more distinct phase separation. However, all of the polymers studied are amorphous materials such that the dissolved soft segments in...
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Hydrogen bonding and polyurethane morphology. I. Quantum mechanical calculations of hydrogen bond energies and vibrational spectroscopy of model compounds
TL;DR: In this paper, advanced quantum mechanical calculations within ab initio molecular orbital theory and density functional theory were performed using gaussian 98 programs in quantitative determination of hydrogen bond (H-bond) energies between various model compound pairs.
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References
Quantitative study on hydrogen bonding between urethane compound and ethers by infrared spectroscopy
TL;DR: A quantitative infrared spectroscopic study of a model urethane-type compound was carried out in order to obtain basic data on hydrogen bonding in polyurethanes as discussed by the authors.
106
Permeation and sorption of CO2 through amine-contained polyurethane and poly(urea–urethane) membranes
TL;DR: In this paper, the authors used a Fourier transform IR spectrophotometer, thermal gravimetric analysis, and rheometric measurement to characterize the properties of Urethane/urea-urea−urethane copolymer (SPU) polymers.
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