Autor según el artículo: Roig, A; Molina, L; Serra, A; Santiago, D; De la Flor, S
Departamento: Enginyeria Mecànica Química Analítica i Química Orgànica
Autor/es de la URV: De la Flor Lopez, Silvia / Roig De Arespacochaga, Anna / Serra Albet, Maria Angels
Palabras clave: Vitrimers Thiol-epoxy Shape-memory Reversible adhesives Functional adhesives Covalent adaptable networks vitrimers thermosets temperature robust reversible adhesives functional adhesives ester dgeba covalent adaptable networks
Resumen: This work presents a family of functional adhesives based on covalent adaptable networks (CANs). Low-cost and commercially available monomers, including diglycidyl ether of bisphenol A, pentaerythritol tetrakis (3-mercapto propionate) and dipentaerythritol hexakis (3-mercapto propionate), were cured using a base catalyst to produce highly cross-linked materials. The catalyst selection and the study of the curing reaction were performed using differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy (FTIR). The catalyst was chosen for better feasibility of industrial production, characterized by short curing times and relatively low temperatures. Thermal stability and thermomechanical properties of the final materials were evaluated through thermogravimetry (TGA) and dynamic mechanical thermal analysis (DMTA), respectively, revealing glass transition temperatures (Tg) higher than 50 °C. Stress relaxation tests were conducted to investigate the vitrimeric behaviour of the polymers, which exhibited an Arrhenius-type dependence of relaxation times on temperature. Importantly, both materials demonstrated impressive creep resistance up to 70 °C, indicating their suitability for use at elevated service temperatures. Tensile and lap-shear tests were also performed, revealing high lap-shear strength values (up to 16 MPa) comparable to those of commercial adhesives. Furthermore, these vitrimers displayed remarkable properties such as shape memory, shape reconfiguration, and self-welding capabilities, underscoring their excellent potential for a wide range of highly demanding applications in industrial production.
Áreas temáticas: Química Polymers and plastics Polymer science Organic chemistry Odontología Medicina ii Medicina i Materials science, characterization & testing Materiais Interdisciplinar Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas iii Ciências ambientais Ciências agrárias i Ciência de alimentos Biotecnología Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: silvia.delaflor@urv.cat angels.serra@urv.cat
Identificador del autor: 0000-0002-6851-1371 0000-0003-1387-0358
Fecha de alta del registro: 2024-02-10
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S0142941823002854?via%3Dihub
URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Polymer Testing. 128
Referencia de l'ítem segons les normes APA: Roig, A; Molina, L; Serra, A; Santiago, D; De la Flor, S (2023). Structural reversible adhesives based on thiol-epoxy vitrimers. Polymer Testing, 128(), -. DOI: 10.1016/j.polymertesting.2023.108205
DOI del artículo: 10.1016/j.polymertesting.2023.108205
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2023
Tipo de publicación: Journal Publications
Repositori URV