Journal ArticleDOI
Rational approximations of the integral of the Arrhenius function
G. I. Senum,Ralph T. Yang +1 more
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Rational approximations have been derived for the integral of the Arrhenius function dT which is important in the kinetic analysis of thermogravimetric data and is found to be equivalent to the Gorbachev approximation.Abstract:
Rational approximations have been derived for the integral of the Arrhenius function
$$\int\limits_0^T {\exp ( - E/RT)}$$
dT which is important in the kinetic analysis of thermogravimetric data. The first degree rational approximation is found to be equivalent to the Gorbachev approximation, i.e., RT2
exp (−E/RT)/(E+2RT). The second degree rational approximation is more accurate than the Zsako empirical approximation when E/RT 5. The third and higher degree rational approximations are found to be more accurate than any other previous approximation.read more
Citations
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Thermal properties and non-isothermal curing kinetics of carbon nanotubes/ionic liquid/epoxy resin systems
TL;DR: In this paper, the non-isothermal curing kinetics of the neat EP, CNTs/EP and CNT/IL/EP composites were investigated, and the activation energy was calculated using the Kissinger equation.
Journal ArticleDOI
The effect of the TiC particle size on the preferred oxidation temperature for self-healing of oxide ceramic matrix materials
TL;DR: In this paper, the effect of particle size on the oxidation kinetics of TiC powders was investigated, and the results showed that the minimal healing temperature for oxide ceramics containing TiC as healing particles can be tailored between 400 and 1000 °C by selecting the right average TiC particle size.
Journal ArticleDOI
Curing behaviors and properties of an extrinsic toughened epoxy/anhydride system and an intrinsic toughened epoxy/anhydride system
TL;DR: In this paper, the curing kinetics of an extrinsic toughened epoxy (mixture of diglycidyl ether of bisphenol-A and 1,4-butanediol epoxy resin, DGEBA/DGEBD) using hexahydrophthalic anhydride (HHPA) as curing agent and tris-(dimethylaminomethyl) phenol (DMP-30) as accelerator were comparatively studied by non-isothermal DSC with a model fitting Malek approach and a model-free advanced
Journal ArticleDOI
Pyrolysis of human feces: Gas yield analysis and kinetic modeling
Tesfayohanes W. Yacob,Tesfayohanes W. Yacob,Richard Chip Fisher,Karl G. Linden,Alan W. Weimer +4 more
TL;DR: Quantitative TGA-MS was used to study pyrolysis of fresh feces and a model free isoconversional and DAEM methods were used for kinetic analysis.
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The kinetics of solid‐state reactions toward consensus—Part I: Uncertainties, failures, and successes of conventional methods
TL;DR: An account of conventional dynamic thermal analysis (TA) with respect to uncertainties, failures, successes, and limitations as applied to solid-state (s-s) processes is discussed in this article.
References
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Journal ArticleDOI
Kinetic Parameters from Thermogravimetric Data
A. W. Coats,J. P. Redfern +1 more
TL;DR: In this article, a thermocouple is used to measure the sample temperature in a Stanton HT-D thermobalance, the bead of which is positioned in or near the sample, depending on crucible design.
Journal ArticleDOI
Empirical formula for the exponential integral in non-isothermal kinetics
TL;DR: The exponential integral of the exponential integral can be approximated by means of the empirical formula, e.g. as mentioned in this paper, which approximates p(x) = - \int\limits_\infty ^x {\frac{{e^{ - u} }}{{u^2 }}} \cdot du\).
Journal ArticleDOI
Reaction kinetics and differential thermal analysis
Ralph T. Yang,Meyer Steinberg +1 more
TL;DR: In this paper, the relationship between chemical kinetics and differential thermal analysis (DTA) curves is studied for the reactions which follow the general rate expression: r = r/sub 0/e/sup -E/RT/(1 - x).