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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Modelos cinéticos de degradación térmica de polímeros: una revisión
Laura María MaríaAranzazu Ríos,Paula Victoria Cárdenas Muñoz,Juan Manuel Cárdenas Giraldo,Guillermo H. Gaviria,Andrés Felipe Rojas González,Javier Ignacio Carrero Mantilla +5 more
TL;DR: In this article, a revision se dedica al ajuste de parametros for modelos cineticos de degradacion termica de polimeros usando termo gravimetria.
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Study on curing kinetics of a diglycidyl ether of bisphenol A epoxy resin/microencapsulated curing agent system
TL;DR: A modified imidazole curing agent, EMI-g-BGE, was encapsulated for one package of diglycidyl ether of bisphenol A (DGEBA) epoxy resin system.
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Kinetic Modeling of Advanced Inorganic Glass-ceramics Formation by Crystal Growth From Pre-existing Nuclei
Nobuyoshi Koga,Jaroslav Šesták +1 more
TL;DR: In this paper, an accommodation function depending on the thermal history of the sample within the temperature range of nucleation was introduced in the kinetic equation, and the role of the accommodation function was reinvestigated when determining the activation energy from a series of kinetic curves.
Journal ArticleDOI
Evaluation of temperature integrals for temperature-dependent frequency factors
TL;DR: In this article, the temperature integrals of the form where m = 1 2, 1, 3 2, and 2 have been evaluated for T = 300-800 K and E = 30-100 kcal mole −1.
Journal ArticleDOI
Combined kinetic analysis of solid‐state reactions: The integral method (ICKA)
M.D. Casal,Gregorio Marbán +1 more
TL;DR: The financial support for this research work provided by the FEDER Funds (GRUPIN2018-IDI/2018/000148, Principado de Asturias) is gratefully acknowledged.
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).