Investigation of the destruction of copolymers of poly(ethylene glycol)fumarate with methacrylic acid using differential equations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10452902" target="_blank" >RIV/00216208:11310/21:10452902 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=taTzk77pln" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=taTzk77pln</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31489/2021Ch3/47-52" target="_blank" >10.31489/2021Ch3/47-52</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of the destruction of copolymers of poly(ethylene glycol)fumarate with methacrylic acid using differential equations

Popis výsledku v původním jazyce

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 (ΔG), enthalpy (ΔH) and entropy of activation (ΔS). 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.

Název v anglickém jazyce

Investigation of the destruction of copolymers of poly(ethylene glycol)fumarate with methacrylic acid using differential equations

Popis výsledku anglicky

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 (ΔG), enthalpy (ΔH) and entropy of activation (ΔS). 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Bulletin of Karaganda State University, Series chemistry

ISSN

2518-718X

e-ISSN

2663-4872

Svazek periodika

neuveden

Číslo periodika v rámci svazku

103

Stát vydavatele periodika

KZ - Republika Kazachstán

Počet stran výsledku

6

Strana od-do

47-52

Kód UT WoS článku

000730543200005

EID výsledku v databázi Scopus

2-s2.0-85117346031