ICTAC Kinetics Committee recommendations for performing kinetic computations on thermal analysis data

Vyazovkin, Sergey; Burnham, Alan K.; Criado, J. M.; Pérez‐Maqueda, Luis A.; Popescu, C.; Sbirrazzuoli, Nicolas

doi:10.1016/j.tca.2011.03.034

Cited by 4,628 publications

(3,528 citation statements)

References 56 publications

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“…From the published literature, the methods using multiple heating rates are adopted for reliable results [24–26]. …”

Section: Resultsmentioning

confidence: 99%

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Synthesis, characterization and thermal decomposition kinetics of a bio-based transparent nylon 10I/10T

Liu

Zhang

et al. 2018

Designed Monomers and Polymers

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Herein, we report a novel transparent engineering plastic nylon 10I/10T based on bio-based poly(decamethylene isophthalamide) (nylon10I). We have demonstrated the one-step melt polycondensation synthesis of transparent nylon and carried out Fourier transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (1H NMR) to confirm the chemical structure. Furthermore, the dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) were used to analyze the thermal properties. Glass transition temperature (Tg) and thermal decomposition onset temperature (T1) of nylon 10I/10T (15 wt. % 10T) were 118.9 and 438.0 °C, respectively. The intrinsic viscosity, water absorption, light transmittance, mechanical properties, solvent resistance and the decomposition mechanism of nylon 10I/10T have also been investigated. The results show that the nylon 10I/10T has lower water absorption and enhanced solvent resistance compared to nylon 6–3-T, which indicates that nylon 10I/10T is a promising transparent plastic.

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“…From the published literature, the methods using multiple heating rates are adopted for reliable results [24–26]. …”

Section: Resultsmentioning

confidence: 99%

“…Moreover, these studies are recommended by the International Confederation for Thermal Analysis and Calorimetry (ICTAC) [18,19], which are included in the present study. The kinetics parameters and activation energy were calculated by Kissinger-Akahira-Sunose (KAS), Flynn−Wall−Ozawa (FWO) and Tang methods.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and thermal decomposition kinetics of a bio-based transparent nylon 10I/10T

Liu

Zhang

et al. 2018

Designed Monomers and Polymers

View full text Add to dashboard Cite

show abstract

“…It can be seen that the mean activation energy obtained by the KAS method is in good agreement and close to those obtained from FWO method. For accuracy, the more reliable Friedman method was also applied for verifying the above mentioned results as recommended by the International Confederation of Thermal Analysis and Calorimetry (ICTAC) and kinetics committee [26]. The necessary data for graphical representation of against (1/T α ) were drawn using Equation 7 at the maximum reaction rate.…”

Section: Thermal Decomposition Kineticsmentioning

confidence: 99%

“…Therefore the reaction model could probably best be described by geometrical contraction reaction mechanisms. The reaction mechanism was further verified by using the more reliable Criado method as recommended by ICTAC and its thermal committee [26]. This method was used for calculating experimental master plots using Equation 10.…”

Section: Reaction Mechanismsmentioning

confidence: 99%

Investigations on Chemical, Thermal Decomposition Behavior, Kinetics, Reaction Mechanism and Thermodynamic Properties of Aged TATB

Singh¹,

Kaur²,

Sarkar³

et al. 2018

Cent. Eur. J. Energ. Mater.

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1,3,5-triamino-2,4,6-trinitrobenzene (TATB) is a kind of insensitive high explosive that can be used as an energetic material in nuclear weapon and space applications. In this work, we have studied the effect of aging on the properties of TATB from a 20 year old lot that had been in direct contact with casing and natural environment conditions. The kinetics was studied using the temperature at the maximum reaction rate (peak) and isoconversional methods from TGA and DTA data obtained at five heating rates under a nitrogen atmosphere. The properties investigated for thermal stability indicate that there is no change in the properties during prolonged exposure in natural environment conditions. The activation energy calculated by the Kissinger method was 179.9 kJ·mol −1 by DTG and the 176.9 kJ·mol −1 by DTA. The experimental results of kinetic analysis obtained by isoconversional methods are in good agreement and very close to each other. In the analysis of reaction mechanisms, the reaction models could be probably best described by a surface contraction mechanism using the Coats-Redfern and Criado methods. The thermodynamic parameters such as Gibbs free energy, enthalpy and entropy of activation were also investigated. The self-accelerating decomposition temperature (TSADT) and critical temperature for thermal explosion (Tb) were also calculated.

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“…The multiple heating rate, model-free, methods provide good estimates of activation energy. [29] The objective of this work was to study nonisothermal degradation mechanisms and kinetics of the flame-retarded HIPS polymer with different types of phosphate and polyphosphate flame retardants. As the first step, dependence of activation energy on conversion (α) was established by isoconversional methods.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Thermal Degradation of High-impact Polystyrene Nanocomposites with Different Flame Retardants using Isoconversional and Model Fitting Methods

Katančić¹,

Grčić²,

Hrnjak-Murgić³

2017

Croat. Chem. Acta

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The non-isothermal degradation of pure high-impact polystyrene (HIPS) and flame retarded HIPS nanocomposites was investigated in the temperature range 25-550 °C at four heating rates in an inert atmosphere. Three different phosphate and polyphosphate based flame retardants were used, while nanosilica and montmorillonite clay were used as nanofillers. Kinetic analysis was performed using isoconversional and model fitting non-linear regression method. Activation energy (Ea) was determined by isoconversional methods of Friedman and KissingerAkahira-Sunose while true kinetic triplets (Ea, A, f(α)) were determined by one step and two-step non-linear regression with various reactions mechanisms. It was found that flame retarded samples exhibit complex degradation which cannot be satisfactorily described by single reaction model fitting. Instead, when each distinctive degradation step was modelled individually it was possible to obtain good fit with Reaction order and Avrami-Erofeev proposed mechanisms while the same was not possible for Diffusion and Autocatalytic mechanisms.

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ICTAC Kinetics Committee recommendations for performing kinetic computations on thermal analysis data

Cited by 4,628 publications

References 56 publications

Synthesis, characterization and thermal decomposition kinetics of a bio-based transparent nylon 10I/10T

Synthesis, characterization and thermal decomposition kinetics of a bio-based transparent nylon 10I/10T

Investigations on Chemical, Thermal Decomposition Behavior, Kinetics, Reaction Mechanism and Thermodynamic Properties of Aged TATB

Kinetic Study of Thermal Degradation of High-impact Polystyrene Nanocomposites with Different Flame Retardants using Isoconversional and Model Fitting Methods

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