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Effect of 1-substituted imidazole derivatives for the curing process of epoxy- -isocyanate composition

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Pilawka R., Kowalska J., Czech Z.
Polish Journal of Chemical Technology
|
2013
|
vol. 15
|
issue 4
36-41
EN
The kinetics of the curing process of isocyanate-epoxy materials hardened in the presence of 1- substituted imidazole derivatives was studied by the Coast-Redfern method. The extent of a conversion parameter of the curing process in two ways was calculated: DSC (peak area integration) and rheology (viscosity changes). The activation energy values were determined for epoxy-isocyanate cured in the presence of 0.5; 1.0 and 2.0 phr 1-substituted imidazole derivatives respectively. Increasing of accelerators amount results in decreasing the activation energy and other kinetic parameters.
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