Crosslinking kinetics of the formation of lignin-aminated polyol-based polyurethane foam

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...

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Bibliographic Details
Published in:Journal of applied polymer science 2012-07, Vol.125 (1), p.152-157
Main Authors: Huo, Shu-Ping, Nie, Ming-Cai, Kong, Zhen-Wu, Wu, Guo-Min, Chen, Jian
Format: Article
Language:English
Subjects:
Applied sciences
Approximation
Blowing agents
Cellular
Crosslinking
Exact sciences and technology
Forms of application and semi-finished materials
FTIR
kinetics
Materials science
Mathematical models
Polymer industry, paints, wood
Polymers
Polyols
Polyurethane foam
polyurethanes
Reaction kinetics
Spectra
Technology of polymers
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Summary: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 (Ea) 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
ISSN:0021-8995
1097-4628
DOI:10.1002/app.35401