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FT‐NIR monitoring of a scattering polyurethane manufactured by reaction injection molding (RIM): univariate and multivariate analysis versus kinetic predictions
Author(s) -
Dupuy J.,
Benali S.,
Maazouz A.,
Lachenal G.,
Bertrand D.
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200208)184:1<249::aid-masy249>3.0.co;2-5
Subject(s) - univariate , multivariate statistics , principal component analysis , materials science , multivariate analysis , calibration , near infrared spectroscopy , analytical chemistry (journal) , spectroscopy , kinetic energy , polyurethane , chemistry , optics , chromatography , composite material , mathematics , statistics , physics , quantum mechanics
Near InfraRed (NIR) spectroscopy was used to monitor in situ a polyurethane synthesis during a RIM process. Univariate and multivariate analysis of transmittance spectra were used to calculate the reaction extent. A very good agreement was observed between multivariate analysis (PCA), univariate (Beer‐Lambert) analysis and kinetic predictions. It was demonstrated that, in this case, PCA methods can provide a good estimation of the reaction extent versus time, without time‐consuming calibration. The spectral range of PCA has to be carefully chosen.