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Proceedings Paper

Real-Time Measurement Of Polyurethane Foam Reactions And Hydrogen-Bonding By FT-IR Spectroscopy
Author(s): B. L. Davis; M. A. Harthcock; C. P. Christenson; R. B. Turner
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Paper Abstract

The reaction and hydrogen-bond formation kinetics which occur in polyurethane foams will have an ultimate effect on the properties of these materials. Measurement of several urethane and urea carbonyl absorptions (free and hydrogen-bonded) provides two important pieces of information: (1) the chemical reactions which occur and (2) the progression of hydrogen-bond formation after reaction has completed. An attenuated total reflectance (ATR) Fourier-transform infrared spectroscopic technique has been previously developed which allows real-time data to be obtained during the foaming reaction 1,2. The authors have adapted a similar system to studying foams in order to more quantitatively interpret the real-time data in terms of the complex hydrogen-bonding structure. The vibrational assignments used for the carbonyl region of polyurethane foam spectra are as follows: 1732 cm-1 free urethane 1712 free urea 1701 ordered hydrogen-bonded urethane 1699-1653 monodentate hydrogen-bonded urea (Fig. 1) 1641 bidentate/ordered hydrogen-bonded urea. (Fig. 1)

Paper Details

Date Published: 1 December 1989
PDF: 2 pages
Proc. SPIE 1145, 7th Intl Conf on Fourier Transform Spectroscopy, (1 December 1989); doi: 10.1117/12.969592
Show Author Affiliations
B. L. Davis, The Dow Chemical Company (United States)
M. A. Harthcock, The Dow Chemical Company (United States)
C. P. Christenson, The Dow Chemical Company (United States)
R. B. Turner, The Dow Chemical Company (United States)

Published in SPIE Proceedings Vol. 1145:
7th Intl Conf on Fourier Transform Spectroscopy
David G. Cameron, Editor(s)

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