The non-equilibrium thermodynamic fluctuation theory was used to predict the gelation time tg and the cure behavior after tg of epoxy／organo-montmorillonite／imidazole intercalated nanocomposites at various temperatures and organo-montmorillonite loadings．The theoretical prediction is in good agreement with the experimental results obtained by dynamic torsional vibration method

and the results show that the addition of organo-montmorillonite reduces the gelation time tg and increases the rate of curing reaction

but has no apparent effect on the apparent activation energy ΔH of the cure reaction after tg．