Journal ArticleDOI
Rational approximations of the integral of the Arrhenius function
G. I. Senum,Ralph T. Yang +1 more
Reads0
Chats0
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
More filters
Journal ArticleDOI
Effect of organically modified montmorillonite filler on the dynamic cure kinetics, thermal stability, and mechanical properties of brominated epoxy/aniline formaldehyde condensates system
TL;DR: In this paper, a nanocomposites based on tetrabromo-bisphenol-A epoxy and aniline formaldehyde condensates, containing 5 and 10% organically modified montmorillonite (O-MMT), were prepared.
Journal ArticleDOI
Reaction pathway and kinetics of CdO nanoparticles prepared from CdCO3 precursor using thermal decomposition method
TL;DR: In this paper, the non-isothermal kinetics of CdO nanoparticles prepared from CdCO 3 precursor using thermal decomposition method was investigated using model-fitting Malek approach and a model-free advanced isoconversional method of Vyazovkin.
Journal ArticleDOI
Influence of synthesis temperature on thermal properties of thermoplastic polyurethane prepared by torque rheometer
TL;DR: In this paper, a torque rheometer (an instrumented batch mixer) was used to obtain thermoplastic polyurethanes (TPUs) at 70, 80, and 90°C and the thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).
Journal ArticleDOI
An approximation to the linear heating rate in non-isothermal kinetics
TL;DR: In this paper, a near-linear representation of the linear heating rate is presented which converts the exponential integral into an integrable form and allows a simple determination of the activation energy to high accuracy.
References
More filters
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).