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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The nature and effects of the thermal stability of lithium hydroxide
TL;DR: In this article, temperature-programmed decomposition and complimentary microscopy/spectroscopy techniques were performed on lithium hydroxide with micron-sized grains and the energy barriers measured for the decomposition of surface and near-surface LiD are noticeably smaller than those of bulk counterpart.
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Novel silicon-modified phenolic novolac resins: Non-isothermal curing kinetics, and mechanical and thermal properties of their biofiber-reinforced composites
Zhiyang Bu,Jijiang Hu,Bo-Geng Li +2 more
TL;DR: A silicone-contained biphenol type monomer, 4,4′-(1,3-dipropyl-tetramethyldisiloxane)bis-2-methoxyphenol(SIE), was used to modify phenolic novolac resin by being copolymerized with phenol and formaldehyde to yield SIE-modified phenolic resins (SPNs) as discussed by the authors.
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Thermal degradation of glass reinforced epoxy resin and polychloroprene rubber: the correlation of kinetic parameters of isothermal accelerated aging with those obtained from non-isothermal data
TL;DR: The results of a kinetic investigation of the non-isothermal and isothermal degradation of a mechanical property for glass reinforced epoxy resin (GRER) and polychloroprene rubber (PCL-R) are presented in this paper.
Journal ArticleDOI
A kinetic study of the thermal decomposition process of potassium metabisulfite: Estimation of distributed reactivity model
TL;DR: In this paper, the thermal decomposition kinetics of potassium metabisulfite were studied by thermogravimetric (TG) and differential DTG (DTG) techniques using non-isothermal experiments using the differential (Friedman) isoconversional method.
Journal ArticleDOI
Kinetic analysis of formation of boron trioxide from thermal decomposition of boric acid under non-isothermal conditions
TL;DR: In this paper, the authors investigated the kinetic analysis of the dehydration process of boric acid and its transformation into boron trioxide (B2O3) under non-isothermal conditions at three different heating rates (3, 5 and 10°C min−1) by using thermogravimetry (TG) technique in argon flow.
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).