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Crosslinking kinetics of the formation of lignin‐aminated polyol‐based polyurethane foam
Author(s) -
Huo ShuPing,
Nie MingCai,
Kong ZhenWu,
Wu GuoMin,
Chen Jian
Publication year - 2011
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.35401
Subject(s) - polyol , polyurethane , fourier transform infrared spectroscopy , kinetics , attenuated total reflection , absorbance , materials science , polymer chemistry , lignin , activation energy , chemical engineering , chemistry , organic chemistry , composite material , chromatography , physics , quantum mechanics , engineering
FTIR‐ATR (Fourier Transform Infrared‐Attenuated Total Reflectance) spectroscopic analysis was used to study the kinetics of the formation of the polyurethane foam, which was prepared by reacting a mixture of lignin‐aminated polyol (LAP) and glycol (PEG) with diphenylmethane diisocyanates (MDI‐50) in the presence of water as blowing agent. The crosslinking reactions were followed by monitoring the change of the absorbance of the NCO group at 2270 cm −1 in FTIR‐ATR spectra. The apparent activation energy ( E a ) calculated according to n‐ th order reaction model was 16.44 kJ/mol, and the frequency factor ( A ′) was 2.69 min −1 . Furthermore, the crosslinking reaction is approximated to be a first‐order reaction. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012