Dynamic Permittivity Measurement of Ground-Tire Rubber (GTR) during Microwave-Assisted Devulcanization
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Pérez Campos, Rafael; Fayos Fernández, José; Monzó Cabrera, Juan; Martín Salamanca, Fernando; López Valentín, Juan; [et al.]Área de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This research project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement number 870,000. More information at https://cordis.europa.eu/project/id/870000 (accessed on 27 August 2022) and https://valuerubber.eu/ (accessed on 27 August 2022). JLV and FMS also thanks the funding from Ministerio de Ciencia e Innovaciió (PID2020-119047RB-I00 y PLEC2021-007793), Gobierno de Aragón (EC-22-2021) and CSIC (201860E045).Realizado en/con
Universidad Politécnica de Cartagena; Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC); Instituto de Tecnologías de la Información y las Comunicaciones, Universitat Politècnica de València (UPV)Fecha de publicación
2022Editorial
MDPICita bibliográfica
Pérez-Campos R, Fayos-Fernández J, Monzó-Cabrera J, Martín Salamanca F, López Valentín J, Catalá-Civera JM, Plaza-González P, Sánchez-Marín JR. Dynamic Permittivity Measurement of Ground-Tire Rubber (GTR) during Microwave-Assisted Devulcanization. Polymers. 2022; 14(17):3543. https://doi.org/10.3390/polym14173543Revisión por pares
siPalabras clave
Ground tire rubberDevulcanization
Microwave
Dielectric heating
Permittivity
Resonant technique
Loss factor
Time-domain NMR
Resumen
Many efforts are being made to find innovative ways of recycling rubber from end-of-life tires (ELTs), also called ground tire Rubber (GTR). Recycling through devulcanization allows the reintroduction of rubber back into the manufacturing industry. Such a process requires providing enough energy to break the sulfur links, while preventing damage to the polymeric chain. Microwave heating is controllable, efficient, and it does not rely on conventional heating mechanisms (conduction, convection) which may involve high heating losses, but rather on direct dielectric heating. However, to adequately control the microwave-assisted devulcanization performance, a thorough knowledge of the GTR permittivity versus temperature is required. In this work, GTR permittivity was monitored during its devulcanization. A resonant technique based on a dual-mode cylindrical cavity was used to simultaneously heat rubber and measure its permittivity at around 2 GHz. The results show sharp changes in the GTR ...
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