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Article

Embedded Resistance Wire Technique for Epoxy Curing and Self-Healing of PET Thermoplastics

1
Composite Materials Group, Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, GR 265 04 Rio Patras, Greece
2
Applied Mechanics Laboratory, Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, GR 265 04 Rio Patras, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Eliot Fried
Solids 2021, 2(3), 314-330; https://doi.org/10.3390/solids2030020
Received: 23 July 2021 / Revised: 17 August 2021 / Accepted: 31 August 2021 / Published: 3 September 2021
(This article belongs to the Special Issue Feature Papers of Solids 2021)
The aim of the present study is to apply an embedded resistance wire technique for curing of thermosetting resins as well as for the self-healing of thermoplastic polymers. The work consists of two parts. In the first part, Kanthal resistance wires embedded in a resin plate acted as heating elements when direct electrical current was flowing through them (Joule heating). During heating, the temperature was continuously monitored using a thermal camera, and accurate temperature times for fixed position diagrams as well as temperature positions for fixed time diagrams were calculated. The effects of curing with this method were evaluated by studying the three-point bending mechanical behavior of the cured resin, comparing it with the corresponding behavior of the same resin when cured using a conventional oven curing method at the same temperature. In the second part of the present work, the possibility of using the same technique for healing existing notches and flaws in a PET thermoplastic is explored. We examined whether providing energy through the resistance wires created the right amount of heat to heal the thermoplastic, or, more specifically, whether it closed the notches and eliminated the abrasions that were artificially created on the specimens. The technique using embedded resistance wires worked equally well, with interesting and promising preliminary results regarding the curing of thermoset resins and the healing of thermoplastics. View Full-Text
Keywords: epoxy resin curing; PET (polyethylene terephthalate); resistance heating; Joule heating; polymer matrix composites (PMCs); self-healing; three-point bending; flexural modulus; flexural strength; thermal imaging epoxy resin curing; PET (polyethylene terephthalate); resistance heating; Joule heating; polymer matrix composites (PMCs); self-healing; three-point bending; flexural modulus; flexural strength; thermal imaging
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MDPI and ACS Style

Kontaxis, L.C.; Kotrotsos, A.; Verbis, S.; Papanicolaou, G.C. Embedded Resistance Wire Technique for Epoxy Curing and Self-Healing of PET Thermoplastics. Solids 2021, 2, 314-330. https://doi.org/10.3390/solids2030020

AMA Style

Kontaxis LC, Kotrotsos A, Verbis S, Papanicolaou GC. Embedded Resistance Wire Technique for Epoxy Curing and Self-Healing of PET Thermoplastics. Solids. 2021; 2(3):314-330. https://doi.org/10.3390/solids2030020

Chicago/Turabian Style

Kontaxis, Lykourgos C., Athanasios Kotrotsos, Spyros Verbis, and George C. Papanicolaou 2021. "Embedded Resistance Wire Technique for Epoxy Curing and Self-Healing of PET Thermoplastics" Solids 2, no. 3: 314-330. https://doi.org/10.3390/solids2030020

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