Kinetic parameters of thermal destruction of the copolymer of polyethylene glycol fumarate with acrylic acid in inert medium
Thermal decomposition of the copolymer of polyethylene glycol fumarate with acrylic acid (p-EGF:AA) of two different compositions synthesized earlier was studied in the present work. TG and DTG curves prove that decomposition takes place in several stages. According to thermogravimetric curves it has been found out that for the copolymer with higher content of acrylic acid the decomposition of the copolymer’s sample is started at higher temperatures. It has been shown the shift of the temperature of decomposition’s start to the higher area with the increase of heating rate which is necessary for the detorsion of macromolecular coil. Experimental data processed using graphical methods of Kissinger–Akahira–Sunose and Friedman allowed us to calculate the activation energy of the thermal decomposition process. It has been established that the copolymer with the composition of 21.03:78.97 mass.% has lower meaning of activation energy than the one with the composition of 68.96:31.04 mass.%. As a result of calculation one can see that the meanings found out using these methods depend slightly on conversion. Using Achar-Brindley-Sharp method and the method of invariant kinetic parameters the kinetic triplet of the decomposition process has been found which was used to build the calculated curve. The dependences of g(α) on α using these parameters showed a satisfactory agreement of calculated curves with the experimental ones. One can conclude that the decomposition process of the copolymer of polyethylene glycol fumarate with acrylic acid is well described with of D3 (three-dimensional diffusion) model.
2 Boenig HV (1964) Unsaturated Polyesters: Structure and Properties. Elsevier, Amsterdam, Netderlands. ISBN: 9780444400611
3 Tang Au-Chin, Yao Kuo-Sui (1959) J Polym Sci 35:219-233. Crossref
4 Gordon M, Grieveson BM, McMillan ID (1955) J Polym Sci 18:497. Crossref
5 Fidanovski BZ, Spasojevic PM, Panic VV, Seslija SI, Spasojevic JP, Popovic IG (2017) J Mater Sci 53:4635-4644. Crossref
6 Vyazovkin S, Burnhnam AK, Criado JM, Perez-Maqueda LA, Popescu C, Sbirrazzuolli N (2011) Thermochim Acta 520:1-19. Crossref
7 Lesnikovich AI, Levchik SV (1983) J Therm Anal 27:89-93. Crossref
8 Burkeev MZ, Sarsenbekova AZ, Bolatbay AN et al (2020) Bulletin of the University of Karahganda. Chemistry 99:4-10. Crossref
9 Burkeev MZ, Bolatbay AN, Sarsenbekova AZ, Davrenbekov SZ, Nasikhatuly E (2021) Russ J Phys Chem A 95:2009-2013. Crossref
10 Kissinger HE (1957) Anaytical Chemistry 29:1702-1706. Crossref
11 Akahira T, Sunose T (1971) SciTechnol 16:22-31. Crossref
12 Friedman HL (1964) J Polym Sci 6:183-185. Crossref
13 Achar BB, Brindley GW, Sharp JH (1966) Kinetics and mechanism of dehydroxylation processes, III. Applications and limitations of dynamic methods, in: L. Heller, A. Weiss Eds. Proc. lnt. Clay Conf. Jerusalem, Israel Prog. Sci. Transl., Jerusalem, Israel. P.67–73.
14 Vinogradova SV, Korstak VV, Ulchitski VI (1968) Polymer Science USSR 7:1757-1764. Crossref
15 Ewa KW (2003) J Appl Polym Sci 88:2851-2857. Crossref
16 Burkeev MZ, Kudaibergen GK, Burkeeva GK et al (2018) Russ J Appl Chem 91:1145-1152. Crossref
17 Burkeev MZ, Kudaibergen GK, Tazhbayev YeM, Hranicek J, Burkeyeva GK, Sarsenbekova AZh (2019) Bulletin of the University of Karaganda. Chemistry 93:32-38. Crossref
18 Kudaibergen GK, Burkeyeva GK, Tazhbayev YM, Burkeyev MZ, Omasheva AV, Yesentayeva NA (2018) Chemical Journal of Kazakhstan 61:216-222. Crossref
19 Sbirrazzuolli N (2013) Thermochimica Acta 564:59-69. Crossref
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.