Doubts about the popular Kissinger method of kinetic evaluation and its applicability for crystallization of cooling melts requiring equilibrium temperatures

Šesták, Jaroslav

doi:10.1007/s10973-020-09430-3

Cited by 4 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By measuring the heat variation with temperature and time, the curing kinetics were characterized. The Kissinger method 33–35 was the most commonly used kinetic method for non-isothermal curing. Equation (1) could be obtained for different heating rates according to the Arrhenius formula:When the reaction reached the maximum rate temperature Tp, d (dα/dt) was 0, which was combined into equation (1) to obtain equation (2):Where x was the conversion rate since n (1-x p ) n −1 was independent of the heating rate β.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The curing kinetics and properties of self-healing and thermally conductive polymeric composites based on ethylene vinyl acetate copolymer filled with nano alumina

Lin,

Zhang,

Gao

et al. 2024

Journal of Plastic Film & Sheeting

View full text Add to dashboard Cite

We have investigated a self-healing thermally conductive Ethylene-vinyl acetate (EVA) hot melt adhesive (NAEDS, which denotes the addition of nano-alumina and disulfide bonded EVA hot melt adhesives) that can be used to effectively solve adhesive layer separation problem in photovoltaic (PV) modules and the difficulty of recycling. More specifically, we used diallyl disulfide as a cross-linking agent for EVA and alumina nanofillers as a reinforcing phase. The nano alumina filler gave the EVA better thermal conductivity. We used FTIR, SEM, and DSC to characterize and analyze NAEDS properties. The disulfide bonds in NAEDS underwent a rearrangement reaction under ultraviolet light, resulting in the self-healing of the resin (self-healing efficiency of 78.8%). The added nano alumina not only reduced the resin curing activation energy, improving its curing performance but also enhanced its thermal conductivity, achieving a 2.61 W/(m*k) thermal conductivity coefficient. The overall NAEDS performance is improved.

show abstract

Section: Methodsmentioning

confidence: 99%

“…By measuring the heat variation with temperature and time, the curing kinetics were characterized. The Kissinger method [33][34][35] was the most commonly used kinetic method for non-isothermal curing. Equation (1) could be obtained for different heating rates according to the Arrhenius formula:…”

Section: Curing Kinetics Modelmentioning

confidence: 99%

The curing kinetics and properties of self-healing and thermally conductive polymeric composites based on ethylene vinyl acetate copolymer filled with nano alumina

Lin,

Zhang,

Gao

et al. 2024

Journal of Plastic Film & Sheeting

View full text Add to dashboard Cite

show abstract

“…The publication [12] shows an E-error of up to 20 percent, thus seeming less negligible in this respect; this of course requires a deeper analysis of such serial measurements and should become the task of the ICTAC kinetic committee [15], which is not trivial and lies against the interests of the kinetic mainstream. The Kissinger method [59] is still the focus of interest and under the analysis of validity conditions, especially for those for which it was not originally derived [61][62][63][64]. In particular, it is used instead of traditional "cold" crystallization of glasses during heating to crystallize melts during opposite cooling, when it is necessary to integrate thermodynamic parameters [63], which is often forgotten.…”

Section: Dta Equation and Thermal Inertia Effect In Kineticsmentioning

confidence: 99%

Dynamic Character of Thermal Analysis Where Thermal Inertia Is a Real and Not Negligible Effect Influencing the Evaluation of Non-Isothermal Kinetics: A Review

Šesták

2021

Thermo

Self Cite

View full text Add to dashboard Cite

The development of instrumentation has allowed thermal analysis to become a widely used method not only in calorimetry but also in the field of non-isothermal kinetics that, however, provides a simplified philosophy of measurements. From the beginning, a methodology is used describing the course of reaction in a simplified temperature regime measured in an inert sample. In a most common case of DTA, the degree of reaction is subtracted from the partial areas of the as-cast peak in the unified mode of the peak linear background. Usually, the effect of thermal inertia, resulting from the reality of heat transfer and changing the peak background to a non-linear s-shaped form, is not incorporated. Therefore, the question of whether or not to include this effect of thermal inertia has become a current underlying problem of thermo-analytical kinetics. The analysis of the rectangular input heat pulses and their DTA responding fundamentally point to the need to include it thus becoming essential and not negligible. In the case of parallel evaluations, the effect of inertia can be partially compensated for each other such as in the Kissinger evaluation method. The study presents a broad overview of the thermo-analytical methodology used and points to the often-neglected literature. However, standard mainstream kinetics procedures need be fixed, and an improved solution found to account for the effect of heat transfer and dissipation, which is becoming the focus of thermal analysis methods of future and also the intention of this review.

show abstract

Where did you come from and where are you heading to, thermal analysis of heating effects?

Šesták

2023

J Therm Anal Calorim

View full text Add to dashboard Cite

The review summarizes the current state, outlook and development of the field of thermal analysis, emphasizing the study of thermal effects as the basis of all other methodologies. Heat and its understanding intertwines throughout the entire civilization from the Greek philosophers through the middle ages to today’s advanced technological era. The foundations of the field of thermal analysis, where heat acts as its own agent, date back to the nineteenth century, and the calorimetric evaluation of heat fluxes became the basis. It views the processes of calibration and rectification specifies the iso- and noniso- degrees of transformation, explains the role of the equilibrium background, which is especially necessary in kinetics. It introduces a new concept of thermodynamics with regard to the constancy of first derivatives and discusses the role of standard temperature and its non-equilibrium variant—tempericity. It describes the constrained states of glasses and assesses the role of dimensions in material science. Finally yet importantly, it deals with the influence of thermoanalytical journals, their role in presenting unusual results, and discusses the role of the dissident science. It also describes the level and influence of adequate books and finally describes discussions and perspectives, i.e. where to look better interpretation for and what is the influence of current over-sophisticated devices.

show abstract

Doubts about the popular Kissinger method of kinetic evaluation and its applicability for crystallization of cooling melts requiring equilibrium temperatures

Cited by 4 publications

References 34 publications

The curing kinetics and properties of self-healing and thermally conductive polymeric composites based on ethylene vinyl acetate copolymer filled with nano alumina

The curing kinetics and properties of self-healing and thermally conductive polymeric composites based on ethylene vinyl acetate copolymer filled with nano alumina

Dynamic Character of Thermal Analysis Where Thermal Inertia Is a Real and Not Negligible Effect Influencing the Evaluation of Non-Isothermal Kinetics: A Review

Where did you come from and where are you heading to, thermal analysis of heating effects?

Contact Info

Product

Resources

About