ABSTRACT The effect of organo-nanoclay (Cloisite 30B) and mixing methods on the cure mechanism, kinetics, and properties of epoxy nanocomposites based on Epon 828 and Epicure 3046 was studied. Two processes were used to prepare the epoxy nanocomposites. The first one is a direct process, in which the clay and epoxy are mixed at room temperature by mechanical mixing. The second one is a high temperature process, in which the clay and epoxy are mixed at 120°C for 1 hour. The heat evolution of the epoxy resin formulation and its nanocomposite systems was measured during dynamic DSC scans at heating rates of 2.5, 5, 10, 15, and 20°C·min-1. The cure kinetics of these systems was modelled by means of different approaches. Kissinger and isoconversional models were used to calculate the kinetics parameters while the Avrami model was utilized to compare the cure behavior of the systems. The presence of Cloisite 30B and the mixing method both had an effect on the cure kinetics and mechanical properties of the epoxy system. Key words: nanoclay, epoxy, nanocomposites, cure kinetics, DSC, mechanical properties