Integral Ways of Calculating the Destruction of Copolymers of Polyethylene Glycol Fumarate with Acrylic Acid

Autor:	E. Nasikhatuly, A. Zh. Sarsenbekova, M. Zh. Burkeev, S. Zh. Davrenbekov, A.N. Bolatbay
Rok vydání:	2021
Předmět:	chemistry.chemical_compound Thermogravimetric analysis Materials science chemistry Thermal decomposition Copolymer Thermodynamics Polyethylene glycol Physical and Theoretical Chemistry Kinetic energy Decomposition Acrylic acid
Zdroj:	Russian Journal of Physical Chemistry A. 95:2009-2013
ISSN:	1531-863X 0036-0244
DOI:	10.1134/s0036024421100034
Popis:	The thermal decomposition of polyethylene glycol fumarate–acrylic acid copolymer is investigated at different rates of heating. It is shown that increasing the rate of heating raises the temperature of the onset of decomposition. The kinetic parameters of decomposition are calculated using the integral Kissinger–Akahira–Sunose procedure. It is found that at different degrees of conversion, the activation energies are very close: E = 205–227 kJ/mol. The effect the composition of the copolymer has on the results from kinetic calculations is shown. The Coates–Redfern approach is used to determine the pre-exponential factor and the model of thermal decomposition. Calculated thermogravimetric curves are constructed and compared to experimental ones.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6dad352024be78108660f55b6cc2c17f https://doi.org/10.1134/s0036024421100034 Zobrazit plný text záznamu Full text from SpringerLink