Autor según el artículo: Santiago, David; Guzman, Dailyn; Ferrando, Francesc; Serra, Angels; De la Flor, Silvia
Departamento: Enginyeria Mecànica
Autor/es de la URV: De la Flor Lopez, Silvia / Ferrando Piera, Francesc / Serra Albet, Maria Angels / Serra Masdeu, Anna Isabel Maria
Palabras clave: Temperature Shape-memory polymers Resin Renewable resources Progress Network structure Epoxy Bio-polymers renewable resources epoxy bio-polymers
Resumen: © 2020 by the authors. A series of bio-based epoxy shape-memory thermosetting polymers were synthesized starting from a triglycidyl phloroglucinol (3EPOPh) and trimethylolpropane triglycidyl ether (TPTE) as epoxy monomers and a polyetheramine (JEF) as crosslinking agent. The evolution of the curing process was studied by differential scanning calorimetry (DSC) and the materials obtained were characterized by means of DSC, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), stress-strain tests, and microindentation. Shape-memory properties were evaluated under free and totally constrained conditions. All results were compared with an industrial epoxy thermoset prepared from standard diglycidyl ether of Bisphenol A (DGEBA). Results revealed that materials prepared from 3EPOPh were more reactive and showed a tighter network with higher crosslinking density and glass transition temperatures than the prepared from DGEBA. The partial substitution of 3EPOPh by TPTE as epoxy comonomer caused an increase in the molecular mobility of the materials but without worsening the thermal stability. The shape-memory polymers (SMPs) prepared from 3EPOPh showed good mechanical properties as well as an excellent shape-memory performance. They showed almost complete shape-recovery and shape-fixation, fast shape-recovery rates, and recovery stress up to 7 MPa. The results obtained in this study allow us to conclude that the triglycidyl phloroglucinol derivative of eugenol is a safe and environmentally friendly alternative to DGEBA for preparing thermosetting shape-memory polymers.
Áreas temáticas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 2073-4360
Direcció de correo del autor: angels.serra@urv.cat annaisabel.serra@urv.cat f.ferrando@urv.cat silvia.delaflor@urv.cat
Identificador del autor: 0000-0003-1387-0358 0000-0001-9353-7154 0000-0003-4450-2734 0000-0002-6851-1371
Fecha de alta del registro: 2024-11-02
Volumen de revista: 12
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.mdpi.com/2073-4360/12/3/542
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Polymers. 12 (3): 542-
Referencia de l'ítem segons les normes APA: Santiago, David; Guzman, Dailyn; Ferrando, Francesc; Serra, Angels; De la Flor, Silvia (2020). Bio-based epoxy shape-memory thermosets from triglycidyl phloroglucinol. Polymers, 12(3), 542-. DOI: 10.3390/polym12030542
DOI del artículo: 10.3390/polym12030542
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2020
Tipo de publicación: Journal Publications