Effect of Nickel Doping on the Cure Kinetics of Epoxy/Fe3 O4 Nanocomposites Publisher



Jouyandeh M¹ ; Karami Z¹ ; Paran SMR¹ ; Mashhadzadeh AH¹ ; Ganjali MR^{1, 2} ; Bagheri B³ ; Zarrintaj P⁴ ; Habibzadeh S⁵ ; Poornima Vijayan P⁶ ; Saeb MR¹
Source: Journal of Composites Science Published:2020

Abstract

This short communication aims to evaluate the cure kinetics of epoxy/Nix Fe3−x O4 nanocomposites. Differential scanning calorimetry (DSC) provided support for cure kinetics analysis based on the variation of activation energy (Eα) as a function of the extent of crosslinking reaction, α. The average values of Eα calculated based on Kissinger and Friedman methods were 59.22 and 57.35 kJ/mol for the neat epoxy, 43.37 and 48.74 kJ/mol for the epoxy/Fe3 O4, and eventually 50.48 and 49.19 kJ/mol for the epoxy/Nix Fe3−x O4 nanocomposites. The partial replacement of Fe2+ ion sites in the Fe3 O4 crystal lattice by the Ni2+ ions changed to some content the cure kinetic profile because of the fact that a lower level of energy was needed for curing by incorporation of Nix Fe3−x O4 into the epoxy matrix. The rate of reaction calculated theoretically adequately fitted with experimental profiles obtained in DSC experiments. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.