Comparative Analysis of Thermal Decomposition Kinetics of Copolymers Based on Polyethylene Glycol Fumarate with Methacrylic Acid

Authors

  • Ulygbek B. Tuleuov Karagandy University of the name of academician E.A. Buketov, Karaganda, Kazakhstan
  • Akerke T. Kazhmuratova Karagandy University of the name of academician E.A. Buketov, Karaganda, Kazakhstan
  • Abylaihan N. Bolatbay Karagandy University of the name of academician E.A. Buketov, Karaganda, Kazakhstan
  • Ermaut Nassikhatuly Karagandy University of the name of academician E.A. Buketov, Karaganda, Kazakhstan
  • Aizhan R. Koishugulova Karagandy University of the name of academician E.A. Buketov, Karaganda, Kazakhstan

DOI:

https://doi.org/10.31489/2959-0663/2-23-6

Keywords:

dynamic thermogravimetry, thermal decomposition, olymer based on polyethylene glycol fumarate with methacrylic acid, activation energy, isoconversional kinetic analysis

Abstract

The thermal properties of a copolymer based on polyethylene glycol fumarate with methacrylic acid in a nitrogen atmosphere were studied in this paper. Four various heating rates and two types of a polyester resin composition were used. The analysis of thermal decomposition kinetics was implemented. Three kinetics me-thods namely Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose and Friedman were applied. Curves of a ther-mogravimetric analysis demonstrated that the thermal decomposition of copolymers with different molar ratios was observed. It was determined that the kinetic data depends on the studied copolymers’ composition. The obtained data showed a good convergence in various heating rates. Also, the thermodynamic characteristics were calculated namely the changes in the Gibbs energy (∆G), enthalpy (∆H) and entropy of activation (∆S). The Achar-Brindley-Sharp method was used to find the invariant kinetic parameters of decomposition. Thus, the the kinetic compensation effect was applied to define a reaction model and a pre-exponential factor. A main phase of the copolymer decomposition in a narrow temperature range was determined. It was attested by a peak on the differential curve. An insignificant mass loss of the volatile-matter yield was observed in the range of 30–150 °C.

Downloads

Published

2023-06-27

How to Cite

Tuleuov, U. B., Kazhmuratova, A. T., Bolatbay, A. N., Nassikhatuly, E., & Koishugulova, A. R. (2023). Comparative Analysis of Thermal Decomposition Kinetics of Copolymers Based on Polyethylene Glycol Fumarate with Methacrylic Acid. EURASIAN JOURNAL OF CHEMISTRY, 28(2 (110). https://doi.org/10.31489/2959-0663/2-23-6

Issue

Vol. 28 No. 2 (110) (2023): Eurasian Journal of Chemistry

Section

PHYSICAL AND ANALYTICAL CHEMISTRY

License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-ND 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.