Journal ArticleDOI
Rational approximations of the integral of the Arrhenius function
G. I. Senum,Ralph T. Yang +1 more
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TLDR
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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Kinetic analysis of non-isothermal thermogravimetric analyser results using a new method for the evaluation of the temperature integral and multi-heating rates
TL;DR: In this article, a technique using non-isothermal thermogravimetric analyser results was developed for the validation of reaction rate models together with associated parameters suitable for chemically controlled gas-solid reactions.
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Curing kinetics and shape-memory behavior of an intrinsically toughened epoxy resin system
TL;DR: A diglycidylether of propoxylated bisphenol-A with two oxypropylene units (DGEBAPO-2) was prepared, and the structure was characterized by FTIR, 1H NMR, and ESI-MS, and a flexible curing agent 2-methyl-1,5-pentanediamine (MPDA) was used to obtain an intrinsically toughened network for potential shape-memory application as mentioned in this paper.
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Kinetics and Mechanism of Thermal Dehydration of KMnPO4·H2O in a Nitrogen Atmosphere
TL;DR: In this paper, the potassium manganese phosphate monohydrate (KMnPO4·H2O) was confirmed to dehydrate in a single step process, and the thermal transformation of this compound is an ideal case for testing t...
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Kinetic study on the slow pyrolysis of nonmetal fraction of waste printed circuit boards (NMF-WPCBs).
TL;DR: Thermogravimetric analysis indicated that the thermal decomposition kinetics of NMF-WPCBs could be better described by the second-order reaction.
Journal ArticleDOI
Advanced isoconversional and master plot analyses on non-isothermal degradation kinetics of AlN (nano)-reinforced HDPE composites
P. Rajeshwari,T. K. Dey +1 more
TL;DR: In this article, the non-isothermal degradation kinetics of polymer nanocomposites composed of high-density polyethylene (HDPE) as polymer matrix and aluminum nitride (AlN) as nanofiller has been studied at variable concentration of (nano) AlN.
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).