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The proposed kinetic model describes the experimental results well and the rate constants follow the Arrhenius equation.
(22) Then, the temperature dependence was modeled using the Arrhenius equation. It is frequently reported in the literature that the water diffusion coefficient in different epoxy systems is around [10.sup.-8] to [10.sup.-10] [cm.sup.2]/s.
This can be explained by the fuel impact, which is represented in the Arrhenius equation with the activation energy [E.sub.A].
By (12), (23), and the Arrhenius equation, the following equations are obtained:
The slope of the Arrhenius equation of the reduced catalyst is a constant across a broad range of temperatures, while for the oxidized catalyst it changed significantly in the course of the reaction.
The relationship between the rate of reaction (k) and the temperature (T) can be represented by the below Arrhenius equation:
where [D.sub.0] is the preexponential factor of Arrhenius equation ([m.sup.2][s.sup.-1]), [E.sub.a] is the activation energy (kJ [mol.sup.-1]), T is temperature of water ([K.sup.-1]), and R is the universal gas constant of 8.314 x [10.sup.-3] (kJ [mol.sup.-1] [K.sup.-1]).
The second zone shows the exponential function, which clearly indicates that the thermal process follows the Arrhenius equation. The activation energy of the electrospun PVP/MWCNT composite is influenced by the reinforcement effect of nanotubes, increased cross-linking density, and restricted mobility of the polymer and nanotube interactions.
(Sestak and Berggren, 1971) In order to describe the change of crystallization rate as a function of temperature, the Arrhenius equation was used for homogeneous kinetics in isothermal processes (ASTM, 2008).
The relationship between the rate at which a reaction proceeded and its temperature was determined by the Arrhenius Equation. In all cases, the Arrhenius activation energy decreased with decreases in the moisture content of the chips.
On the other hand, it was observed that the values for the frequency factor in the Arrhenius equation are different.