Influence of Mineral Fillers on the Curing Process and Thermal Degradation of Polyethylene Glycol Maleate - Acrylic Acid-Based Systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10515613" target="_blank" >RIV/00216208:11310/25:10515613 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J.sTXo26y" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J.sTXo26y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym17192675" target="_blank" >10.3390/polym17192675</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Mineral Fillers on the Curing Process and Thermal Degradation of Polyethylene Glycol Maleate - Acrylic Acid-Based Systems

Popis výsledku v původním jazyce

For the first time, the kinetics of isothermal curing and thermal degradation of polyethylene glycol maleate (pEGM)-based systems and their composites with mineral fillers were investigated in the presence of a benzoyl peroxide/N,N-Dimethylaniline redox-initiating system. DSC analysis revealed that the curing process at 20 °C can be described by the modified Kamal autocatalytic model; the critical degree of conversion (α(c)) decreases with increasing content of the unsaturated polyester pEGM and in the presence of fillers. In particular, for unfilled systems, α(c) was 0.77 for pEGM45 and 0.60 for pEGM60. TGA results demonstrated that higher pEGM content and the incorporation of fillers lead to increased thermal stability and residual mass, along with a reduction in the maximum decomposition rate (dTG(max)). Calculations using the Kissinger-Akahira-Sunose and Friedman methods also confirmed an increase in the activation energy of thermal degradation (E(a)): EKAS was 419 kJ/mol for pEGM45 and 470 kJ/mol for pEGM60, with the highest values observed for pEGM60 systems with fillers (496 kJ/mol for SiO2 and 514 kJ/mol for CaCO3). Rheological studies employing three-interval thixotropy tests revealed the onset of thixotropic behavior upon filler addition and an increase in structure recovery after deformation of up to 56%. These findings underscore the potential of pEGM-based systems for low-temperature curing and for the design of composite materials with improved thermal resistance.

Název v anglickém jazyce

Influence of Mineral Fillers on the Curing Process and Thermal Degradation of Polyethylene Glycol Maleate - Acrylic Acid-Based Systems

Popis výsledku anglicky

For the first time, the kinetics of isothermal curing and thermal degradation of polyethylene glycol maleate (pEGM)-based systems and their composites with mineral fillers were investigated in the presence of a benzoyl peroxide/N,N-Dimethylaniline redox-initiating system. DSC analysis revealed that the curing process at 20 °C can be described by the modified Kamal autocatalytic model; the critical degree of conversion (α(c)) decreases with increasing content of the unsaturated polyester pEGM and in the presence of fillers. In particular, for unfilled systems, α(c) was 0.77 for pEGM45 and 0.60 for pEGM60. TGA results demonstrated that higher pEGM content and the incorporation of fillers lead to increased thermal stability and residual mass, along with a reduction in the maximum decomposition rate (dTG(max)). Calculations using the Kissinger-Akahira-Sunose and Friedman methods also confirmed an increase in the activation energy of thermal degradation (E(a)): EKAS was 419 kJ/mol for pEGM45 and 470 kJ/mol for pEGM60, with the highest values observed for pEGM60 systems with fillers (496 kJ/mol for SiO2 and 514 kJ/mol for CaCO3). Rheological studies employing three-interval thixotropy tests revealed the onset of thixotropic behavior upon filler addition and an increase in structure recovery after deformation of up to 56%. These findings underscore the potential of pEGM-based systems for low-temperature curing and for the design of composite materials with improved thermal resistance.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Polymers

ISSN

2073-4360

e-ISSN

2073-4360

Svazek periodika

17

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

24

Strana od-do

2675

Kód UT WoS článku

001593528400001

EID výsledku v databázi Scopus

2-s2.0-105018797544