Author, as appears in the article.: Santiago D; Guzmán D; Ferrando F; Serra À; De la Flor S

Department: Enginyeria Mecànica

URV's Author/s: De la Flor Lopez, Silvia / Ferrando Piera, Francesc / Serra Albet, Maria Angels

Keywords: Temperature Shape-memory polymers Resin Renewable resources Progress Network structure Epoxy Bio-polymers renewable resources epoxy bio-polymers

Abstract: © 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.

Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 2073-4360

Author's mail: silvia.delaflor@urv.cat f.ferrando@urv.cat angels.serra@urv.cat

Author identifier: 0000-0002-6851-1371 0000-0003-4450-2734 0000-0003-1387-0358

Record's date: 2023-02-19

Journal volume: 12

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/2073-4360/12/3/542

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Polymers. 12 (3):

APA: Santiago D; Guzmán D; Ferrando F; Serra À; De la Flor S (2020). Bio-based epoxy shape-memory thermosets from triglycidyl phloroglucinol. Polymers, 12(3), -. DOI: 10.3390/polym12030542

Article's DOI: 10.3390/polym12030542

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

Publication Type: Journal Publications