Cross-Linking Reaction of Bio-Based Epoxy Systems: An Investigation into Cure Kinetics

The cure kinetics of various epoxy resin mixtures, comprising a bisphenol epoxy, two epoxy modifiers, and two hardening agents derived from cardanol technology, were investigated through differential scanning calorimetry (DSC). The development of these mixtures aimed to achieve epoxy materials with...

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Bibliographic Details
Published in:Polymers 2024-09, Vol.16 (17), p.2499
Main Authors: Di Matteo, Pietro, Iadarola, Andrea, Ciardiello, Raffaele, Paolino, Davide Salvatore, Gazza, Francesco, Lambertini, Vito Guido, Brunella, Valentina
Format: Article
Language:English
Subjects:
Automobile industry
Chemical reactions
Crosslinking
Curing
Epoxy resins
Experiments
Flexibility
Kinetics
Mechanical properties
Mixtures
Novolacs
Parameter modification
Phenols
Polymer blends
Temperature
Tensile tests
Thermodynamic properties
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Summary:The cure kinetics of various epoxy resin mixtures, comprising a bisphenol epoxy, two epoxy modifiers, and two hardening agents derived from cardanol technology, were investigated through differential scanning calorimetry (DSC). The development of these mixtures aimed to achieve epoxy materials with a substantial bio-content up to 50% for potential automotive applications, aligning with the 2019 European Regulation on climate neutrality and CO emission. The Friedman isoconversional method was employed to determine key kinetic parameters, such as activation energy and pre-exponential factor, providing insights into the cross-linking process and the Kamal-Sourour model was used to describe and predict the kinetics of the chemical reactions. This empirical approach was implemented to forecast the curing process for the specific oven curing cycle utilised. Additionally, tensile tests revealed promising results showcasing materials' viability against conventional counterparts. Overall, this investigation offers a comprehensive understanding of the cure kinetics, mechanical behaviour, and thermal properties of the novel epoxy-novolac blends, contributing to the development of high-performance materials for sustainable automotive applications.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym16172499