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Flexible polyurethane foam. I. FTIR analysis of residual isocyanate
Author(s) -
Cole K. C.,
Van Gheluwe P.,
Hébrard M. J.,
Leroux J.
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070340131
Subject(s) - isocyanate , polyurethane , fourier transform infrared spectroscopy , relative humidity , materials science , residual , infrared spectroscopy , polymer chemistry , composite material , chemical engineering , chemistry , organic chemistry , mathematics , physics , algorithm , engineering , thermodynamics
A method for the measurement of residual isocyanate in flexible polyurethane foam by attenuated total reflectance Fourier‐transform infrared spectroscopy is described. Residual isocyanate as a function of time was measured in freshly made foams of varying isocyanate index. The effect of relative humidity during storage on the decrease in isocyanate concentration was investigated. As expected, aging under humid conditions was found to decrease the isocyanate concentration faster than under dry conditions. However, even after long periods of time under high humidity, traces of bound isocyanate remained. The fate of the isocyanate is discussed.