Thermal degradation kinetics of two acrylic-based copolymers

López-Beceiro, Jorge; Álvarez-García, Ana; Martins, Sandrine; García, Begoña Álvarez; Zaragoza, Sonia; Menéndez-Valdés, J.; Artiaga, Ramón

doi:10.1007/s10973-014-4386-y

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Thus, although the physical meaning of the energy barrier is similar to the activation energy in Arrhenius‐based models, the values cannot be compared between models with different temperature dependences because there is not an univocal correspondence between both parameters. A recent work of the authors compared the energy barrier values obtained for other processes and materials assuming the same model than in the present work . In this context, the true energy barrier value obtained here, 22 kJ mol −1 , is of the same order than those obtained for the main degradation step of two acrylic‐based copolymers (about 11 kJ mol −1 ).…”

Section: Methodssupporting

confidence: 56%

“…Thermogravimetric analysis (TG) is frequently used to evaluate the thermal stability of polymers and composites and to perform kinetic analysis of the degradation processes. Most of the methods used for determining the kinetic parameters of physico‐chemical processes from thermal analysis data can be classified in one of these two approaches: model fitting and model‐free procedures.…”

Section: Introductionmentioning

confidence: 99%

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Thermogravimetric study of thermal degradation of polyetherimide

Zaragoza

Álvarez

Lasa-Alvarez

et al. 2015

J of Applied Polymer Sci

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Thermal stability in nonoxidizing atmosphere of a polyetherimide (PEI) is investigated by thermogravimetry (TG). It is observed that thermal degradation of this product consists of two overlapping processes, which are conveniently separated by fitting the TG curves to mixtures of generalized logistic functions. Thus, each process is represented by a single function. The analysis of the fitting parameter values obtained for the main degradation process in different isothermal and heating ramp conditions allows to obtain insightful kinetic parameters (critical temperature, energy barrier, and reaction-order) which allow to make predictions in both isothermal and nonisothermal contexts. There is a minimum temperature for each process to occur and a ramp-energy barrier related to the process rate. In the ramp context, the values of these two parameters explain that, although one process starts at lower temperature, it proceeds at a very low rate until reaching temperatures at which the other process goes much faster. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42329.

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Section: Methodssupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Thermogravimetric study of thermal degradation of polyetherimide

Zaragoza

Álvarez

Lasa-Alvarez

et al. 2015

J of Applied Polymer Sci

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“…Three types of experiments were done: The experimentally obtained isothermal time derivative TG (DTG) curves were fitted by a time derivative logistic function. This function is suitable for accurately representing degradation curves of cellulose and other polymers accurately [36][37][38].…”

Section: Methodsmentioning

confidence: 99%

The Complexity of Lignin Thermal Degradation in the Isothermal Context

et al. 2021

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Thermal degradation of lignin in nitrogen atmosphere is evaluated by linear heating and isothermal tests. While linear heating suggests that thermal decomposition in the 200–400 °C range mainly consists of a single step, a careful analysis of isothermal tests points to different lignin fractions having different stabilities. This is an important point for practical predictions, since kinetics obtained as if the degradations at different temperatures were the same would lack practical utility. Instead, stairway type tests are proposed to evaluate the degradation rates and sample quantities involved at the temperatures of interest.

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“…In other cases, the complete degradation is fitted with 5 a non-linear model using one or more chemical reaction or rate dependencies [25][26][27][28][29]. For 6 flame retarded polymer composites, modelled kinetic studies appear to be rare, as again, 7 overall reaction schemes are even more complicated due to increased chemical reactions 8 occurring, found references only discuss model-free kinetic techniques for rate estimation 9 [30][31][32][33][34][35][36][37].…”

Section: Introduction 1mentioning

confidence: 99%