Heterogeneous reaction kinetics of epoxide-functionalized regenerated cellulose membrane and aliphatic amine

▸ The heterogeneous epoxy/amine reaction for epoxy-functionalized cellulose with excess amine is studied. ▸ Both isothermal and dynamic DSC data are analyzed. ▸ The heterogenous reaction is found to be first order autocatalytic. ▸ The activation energy is found to be higher than that for the homogen...

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Bibliographic Details
Published in:Thermochimica acta 2012-09, Vol.543, p.18-23
Main Authors: Koh, Yung P., Karim, M. Nazmul, Simon, Sindee L.
Format: Article
Language:English
Subjects:
Activation energy
calorimetry
cellulose
Chemical thermodynamics
Chemistry
differential scanning calorimetry
DSC
epoxides
Epoxy
Exact sciences and technology
General and physical chemistry
General. Theory
Heterogeneous reaction
Reaction kinetics
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Summary:▸ The heterogeneous epoxy/amine reaction for epoxy-functionalized cellulose with excess amine is studied. ▸ Both isothermal and dynamic DSC data are analyzed. ▸ The heterogenous reaction is found to be first order autocatalytic. ▸ The activation energy is found to be higher than that for the homogeneous reaction. ▸ The higher Ea is attributed to steric effects caused by immobilization of the epoxide groups. The reaction kinetics of an epoxide-functionalized regenerated cellulose membrane with excess aliphatic amine are examined using differential scanning calorimetry. Both isothermal and dynamic experiments are analyzed. The reaction is found to follow first-order autocatalytic kinetics. The activation energy based on five different methods ranges from 77.0 to 79.7 kJ/mol, indicating that the apparent activation energy for the heterogeneous epoxy/aliphatic amine reaction is considerably higher than the values reported in the literature for the homogeneous reaction.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2012.04.031