Characterization of Polyurethane Foams by Mid-Infrared Fiber/FT-IR Spectrometry
1993; SAGE Publishing; Volume: 47; Issue: 2 Linguagem: Inglês
10.1366/0003702934048334
ISSN1943-3530
AutoresJames A. de Haseth, Jennifer Andrews, John V. McClusky, Ralph D. Priester, M. A. Harthcock, Bradley L. Davis,
Tópico(s)Cultural Heritage Materials Analysis
ResumoThe use of a mid-infrared transmitting fiber to monitor the cure process of a polyurethane foam is described. A chalcogenide fiber was situated between the spectrometer and a remote detector, but passed through the center of a polyurethane foam. This fiber was used as an internal reflectance element to observe changes in the polyurethane curing process. The appearance and disappearance of absorbances in the NH-stretching, carbonyl stretching (free urea and urethane, hydrogen-bonded urethane, and monodentate and bidentate hydrogen-bonded urea), isocyanate, and isocyanurate regions were monitored. These changes provided information about the reaction kinetics and morphological development of the foam.
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