Autor segons l'article: Roig, Adria; Agizza, Marco; Serra, Angels; De la Flor, Silvia
Departament: Enginyeria Mecànica Química Analítica i Química Orgànica
Autor/s de la URV: De la Flor Lopez, Silvia / Roig De Arespacochaga, Anna / Serra Albet, Maria Angels
Paraules clau: Vitrimers Internal catalysis Eugenol Disulfide Cystamine Bio-based
Resum: This study reports the synthesis and characterization of bio-based disulfide vitrimers obtained from diepoxy eugenol and cystamine through an epoxy-amine polycondensation process. TREN was added to the formulation in varying proportions to increase the crosslinking density. Although TREN reduced the number of disulfide groups in the vitrimers, it resulted in a maximum relaxation rate at a proportion of 25%. The vitrimers were characterized using FTIR, TGA, and thermomechanical analysis, and their Tg values, determined by DSC, ranged from 75 to 103 °C with increasing TREN proportion. The vitrimers rapidly relax with a relaxation time (τ) of 8.5 min at 170 °C. The addition of TREN decreased the relaxation times from 2.8 to 1.03 min by catalyzing the disulfide metathesis and achieving a balance between the proportion of disulfide bonds and the content of nucleophilic tertiary amines. Creep tests were performed at a wide range of temperatures to investigate the viscosity of the material below and above the Tgs. The topology freezing temperatures were calculated from the creep tests, and Tv values below Tg in all cases confirmed the catalytic effect of tertiary amines on the disulfide exchange reaction.
Àrees temàtiques: Química Polymers and plastics Polymer science Physics and astronomy (miscellaneous) Physics and astronomy (all) Organic chemistry Odontología Materials chemistry Materiais Interdisciplinar General physics and astronomy Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências ambientais Ciência de alimentos Ciência da computação Biotecnología Astronomia / física Arquitetura, urbanismo e design
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: angels.serra@urv.cat silvia.delaflor@urv.cat
Identificador de l'autor: 0000-0003-1387-0358 0000-0002-6851-1371
Data d'alta del registre: 2024-11-02
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0014305723003683
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: European Polymer Journal. 194 112185-
Referència de l'ítem segons les normes APA: Roig, Adria; Agizza, Marco; Serra, Angels; De la Flor, Silvia (2023). Disulfide vitrimeric materials based on cystamine and diepoxy eugenol as bio-based monomers. European Polymer Journal, 194(), 112185-. DOI: 10.1016/j.eurpolymj.2023.112185
DOI de l'article: 10.1016/j.eurpolymj.2023.112185
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2023
Tipus de publicació: Journal Publications