Investigation of the destruction of copolymers of poly(ethylene glycol)fumarate with methacrylic acid using differential equations
Полиэтиленгликольфумараттың метакрил қышқылымен сополимерлерінің деструкциясын дифференциалдық теңдеулер қолдану арқылы зерттеу
Исследования деструкции сополимеров полиэтиленгликольфумарата с метакриловой кислотой с использованием дифференциальных уравнений
Burkeyev M.Z. Tuleuov U.B. Bolatbay A.N. Khavlichek D. Davrenbekov S.Z. Tazhbayev Y.M. Zhakupbekova E.Z.
2021E.A.Buketov Karaganda State University Publish House
Bulletin of the Karaganda University Chemistry Series
2021#103Issue 347 - 52 pp.
In the article the thermal characteristics of a copolymer of poly(ethylene glycol)fumarate with methacrylic acid were studied in a dynamic mode in a nitrogen atmosphere for the first time. A kinetic analysis of the thermal destruction process was carried out using three different data processing methods (Freeman-Carroll, Sharp-Wentworth, Achar). Thermodynamic characteristics were also calculated, namely the change in the Gibbs energy (∆G), enthalpy (∆H) and entropy of activation (∆S). The curves of thermogravimetric and differential thermogravimetric analysis of the copolymer were studied in a nitrogen atmosphere at a heating rate of 10 °C/min. The main stage of the copolymer decomposition was found to occur in a narrow temperature range, which is confirmed by a peak in the differential curve. Changes in the reaction rate of the copolymer were shown due to the decrease in the sample mass. It was shown that the results of kinetic analysis depend on the molecular structure of the compounds under study. The activation energies found by the Freeman-Carroll method have lower values, while the Achar and Sharp-Wentworth methods give the same results.
Activation energy , Copolymer of poly(ethylene glycol)fumarate with methacrylic acid , Dynamic thermogravimetry , Thermal destruction
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Karagandy University of the name of academician E.A. Buketov, Universitetskaya street, 28, Karaganda, 100024, Kazakhstan
Charles University in Prague, Pasteurova 1, Prague, 400 96, Czech Republic
Karagandy University of the name of academician E.A. Buketov
Charles University in Prague
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