Kinetic analysis of isothermal cures performed below the limiting glass transition temperature

The paper addresses the problem of the application of isoconversional kinetic analysis to incomplete cures. Contrary to the expectations, a theoretical analysis suggests that correct estimates of the activation energy can be obtained if one uses the relative extents of cure instead of the absolute values. This conclusion is illustrated by simulated data for a hypothetical process and experimental data for epoxy‐novolac cure.