Influence of Mineral Fillers on the Curing Process and Thermal Degradation of Polyethylene Glycol Maleate - Acrylic Acid-Based Systems
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Influence of Mineral Fillers on the Curing Process and Thermal Degradation of Polyethylene Glycol Maleate - Acrylic Acid-Based Systems
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymers
ISSN
2073-4360
e-ISSN
2073-4360
Volume of the periodical
17
Issue of the periodical within the volume
19
Country of publishing house
CH - SWITZERLAND
Number of pages
24
Pages from-to
2675
UT code for WoS article
001593528400001
EID of the result in the Scopus database
2-s2.0-105018797544