Abstract
Epoxy nanocomposites containing electrochemically synthesized Fe3O4 and Zn-doped Fe3O4 (Zn-Fe3O4) were prepared and their cure behavior and kinetics were discussed by the aid of nonisothermal differential scanning calorimetry and isoconversional methods. The results of differential and integral isoconversional methods indicated that addition of Fe3O4 nanoparticles to epoxy decreases the activation energy of the epoxy nanocomposite with respect to the unfilled epoxy due to the steric hindrance effect as a consequence of aggregation of magnetic Fe3O4 nanoparticles. By contrast, Zn-Fe3O4 nanoparticles facilitated crosslinking of epoxy due to the autocatalytic reaction of OH groups on the surface of nanoparticles with epoxy groups.
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