Determination of activation energy and preexponential factor of thermoset reaction kinetics using differential scanning calorimetry in scanning mode: Influence of baseline shape on different calculation methods

Dupuy, Jérôme; Leroy, Éric; Maazouz, Abderrahim

doi:10.1002/1097-4628(20001220)78:13<2262::aid-app40>3.0.co;2-y

Cited by 33 publications

(24 citation statements)

References 23 publications

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“…The DSC is preferred because of an accurate temperature regulation and good recording of the energy dissipation [12] [16]. The DSC-analysis was done with 7 mg CYCLOTENE 4024-40 in an inert atmosphere using a "Q2000" machine from the TA Instruments Company.…”

Section: Measurement Of the Polymerization Degree Of Bcbmentioning

confidence: 99%

Polymerization of Thin Film Polymers

Woehrmann¹,

Toepper²

2012

New Polymers for Special Applications

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Section: Measurement Of the Polymerization Degree Of Bcbmentioning

confidence: 99%

Polymerization of Thin Film Polymers

Woehrmann¹,

Toepper²

2012

New Polymers for Special Applications

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“…The temperature dependence of the rate constant is normally given by an Arrhenius relationship [7,8] …”

Section: Glass Transition Temperature Versus Timementioning

confidence: 99%

Modelling and Prediction of the Diglycidyl Ether Bisphenol-A/2,2′-dimethyl-4,4′-methylenebis (cyclohexylamine) Reaction

Fouchal

Harris

Knight

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part L:

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Differential scanning calorimetry is used for the analysis and quantitative evaluation of the reaction between diglycidyl ether bisphenol-A and 2,2 0 -dimethyl-4,4 0 -methylenebis (cyclohexylamine) according to changes in concentrations of reactants and products. First, this concerned determining the variation in enthalpy of reaction over time for different curing temperatures, plotting of glass transition temperatures versus time, calculation of a polynomial for glass transition temperature against fractional conversion, and the production of plots of fractional conversions versus time. Secondly, the fractional conversion data were used for the kinetic analysis. The line of best fit to these data points revealed an essentially logarithmic relationship that was used to evaluate the reaction rate, dx/dt corresponding to the conversion x, then plot the changes in concentrations (in moles) of all the reactants and products involved in the reaction versus time. This produced a quantitative prediction of the reaction over the curing period.

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“…Each experiment provides a set of data including time, temperature, conversion degree and rate of reaction, [6,7] assuming that D r H is a constant over all the experimental temperature range (although this hypothesis has some limitations [2,8] ). A more crucial experimental problem is the interpolation of the baseline lying under the exothermal peak.…”

Section: And 'mentioning

confidence: 99%

“…Various types of baseline interpolation are proposed in the literature [5] and the choice of a wrong baseline can induce significant errors on parameters estimated afterwards. [8] Temperature modulated DSC is a recent improvement of DSC apparatus [9] which enables the baseline problem to be bypassed. In this new technique, a temperature modulation is added to the usual temperature ramp.…”

Section: And 'mentioning

confidence: 99%