Advanced integral isoconversional analysis for evaluating and predicting the kinetic parameters of the curing reaction of epoxy prepreg

► Three methods are proposed to calculate the kinetic parameters of an epoxy prepreg. ► Advanced model-free, semi-model fitting and model fitting methods have been used. ► The first method correctly predicts isothermal and non-isothermal DSC experiments. ► The second method predicts only non-isother...

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Bibliographic Details
Published in:Thermochimica acta 2013-04, Vol.557, p.37-43
Main Authors: Vafayan, Mehdy, Hosain Beheshty, Mohammad, Ghoreishy, Mir Hamid Reza, Abedini, Hossein
Format: Article
Language:English
Subjects:
Activation energy
Advanced integral isoconversional
Conversion
Cure kinetics
Curing
Differential scanning calorimetry
epoxides
Epoxy prepreg
equations
glass
Integrals
Mathematical models
Non-isothermal
prediction
Prepregs
Reaction kinetics
temperature
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Summary:► Three methods are proposed to calculate the kinetic parameters of an epoxy prepreg. ► Advanced model-free, semi-model fitting and model fitting methods have been used. ► The first method correctly predicts isothermal and non-isothermal DSC experiments. ► The second method predicts only non-isothermal DSC experiments. ► The third method cannot predict experiments outside the experimental temperature regions. The kinetic parameters of the curing reaction of epoxy/glass prepreg have been evaluated and predicted by three different methods using the non-isothermal differential scanning calorimetry (DSC) data. In the first method, the dependence of activation energy, pre-exponential factor and reaction model on the extent of conversion have been calculated in the tabular form using advanced integral isoconversional method and then converted to the equation form. In the second method, the kinetic parameters of the Kamal and diffusion models have been evaluated using the activation energy dependency on the extent of conversion to reduce the number of kinetic parameters in minimization procedure. In the third method, a conventional non-isothermal model-fitting method has been used to evaluate the kinetic parameters of Sourour and Kamal's model. The predictions made by the methods based on the advanced isoconversional analysis show good agreement to both isothermal and non-isothermal experiments outside the experimental temperature regions.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2013.01.035