Author, as appears in the article.: Santiago, D; Guzman, D; Padilla, J; Verdugo, P; de la Flor, S; Serra, A
Department: Química Analítica i Química Orgànica Enginyeria Mecànica
URV's Author/s: De la Flor Lopez, Silvia / Serra Albet, Maria Angels / Verdugo Fernandez, Pedro Manuel
Keywords: Vitrimers Thermosets Recycling Lightweight Glass-transition Epoxy Adhesion vitrimers transesterification thermosets temperature silica recycling lightweight fracture composite catalyst bonded joints adhesion
Abstract: Epoxy-based vitrimers represent a promising option toward sustainability and circular economy in automotive structural applications. In this work, a series of vitrimer materials are presented to be used as recyclable and reprocessable adhesives for such applications. These formulations consist of diglycidyl ether of bisphenol A-anhydride systems with glutaric anhydride and glycerol as cocuring agents in several proportions and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) or 1-methylimidazole (1MI) as catalysts. The materials obtained revealed relatively high Tg s, up to 85 °C, as well as a homogeneous network structure. They also showed complete stress relaxation in times as short as just 3.6 min at 180 °C. The presence of TBD in the vitrimer allows the fastest relaxation. The thermosets were recycled and reprocessed through alcoholysis and mechanical grinding. These formulations were also applied as adhesives for mono- and multimaterial joints showing values of single-lap shear stress as high as those shown by commercial adhesives. Reversible adhesion was also studied after joint failure and after debonding without failure. In summary, the materials and methodology presented here represent a comprehensive study of recyclable and reprocessable epoxy-based vitrimers.
Thematic Areas: Process chemistry and technology Polymers and plastics Polymer science Organic chemistry Materials science, multidisciplinary
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: angels.serra@urv.cat silvia.delaflor@urv.cat
Author identifier: 0000-0003-1387-0358 0000-0002-6851-1371
Record's date: 2024-08-03
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://pubs.acs.org/doi/10.1021/acsapm.2c02063
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Acs Applied Polymer Materials. 5 (3): 2006-2015
APA: Santiago, D; Guzman, D; Padilla, J; Verdugo, P; de la Flor, S; Serra, A (2023). Recyclable and Reprocessable Epoxy Vitrimer Adhesives. Acs Applied Polymer Materials, 5(3), 2006-2015. DOI: 10.1021/acsapm.2c02063
Article's DOI: 10.1021/acsapm.2c02063
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications