Repositori institucional URV
| Autor/es de la URV: | De la Flor Lopez, Silvia / Montané Montané, Xavier / Serra Albet, Maria Angels / Telatin, Tommaso |
| Autor según el artículo: | Telatin T; De la Flor S; Serra À; Montané X |
| Direcció de correo del autor: | silvia.delaflor@urv.cat xavier.montane@urv.cat tommaso.telatin@urv.cat angels.serra@urv.cat |
| Identificador del autor: | 0000-0002-6851-1371 0000-0002-1426-239X 0000-0003-1387-0358 |
| Año de publicación de la revista: | 2024 |
| Tipo de publicación: | Journal Publications |
| Referencia de l'ítem segons les normes APA: | Telatin T; De la Flor S; Serra À; Montané X (2024). Poly(epoxy-imine) vitrimers. Effect of the structure on the stress relaxation and creep resistance. Polymer Testing, 135(), -. DOI: 10.1016/j.polymertesting.2024.108465 |
| Referencia al articulo segun fuente origial: | Polymer Testing. 135 |
| Resumen: | A series of polyimine-epoxy vitrimers has been synthesized using commercially available monomers using a two-step synthetic route to maximize the content of imine groups in the resulting structures. The first step consists of the synthesis of amine terminated polyimine oligomers, which were synthesized by a condensation reaction of terephthalaldehyde (TA) with different proportions of diethylenetriamine (DETA) and a polyetheramine (Jeffamine D-230 or D-400). After that, the obtained viscous oligomers were cross-linked with bisphenol A diglycidyl ether (DGEBA). The design of network architectures using this approach is a powerful tool that allows controlling the concentration of imine groups, the dimensions of the intermediate polyimine oligomer and the polarity and mobility of its chains, confirming that it is an effective way to tune the thermal, mechanical and thermomechanical properties of the final materials. Furthermore, this work confirmed that an accurate design of the network architecture allows simultaneously improving the two main requirements of vitrimers by increasing the content of imine groups: fast stress relaxation processes and high creep resistance. Stress relaxation curves proved that these polyimine vitrimers could relax the 63 % of the initial stress in less than 9.6 min at 160 °C without any added catalyst. Besides, replacing Jeffamine D-400 with Jeffamine D-230 in the imine oligomer increases the material's resistance to creep at service temperatures. All the materials prepared present high thermal stability and showed Tgs between 31 and 93 °C. |
| DOI del artículo: | 10.1016/j.polymertesting.2024.108465 |
| Enlace a la fuente original: | https://www.sciencedirect.com/science/article/pii/S0142941824001429?via%3Dihub |
| Versión del articulo depositado: | info:eu-repo/semantics/publishedVersion |
| Acceso a la licencia de uso: | https://creativecommons.org/licenses/by/3.0/es/ |
| Departamento: | Química Analítica i Química Orgànica |
| URL Documento de licencia: | https://repositori.urv.cat/ca/proteccio-de-dades/ |
| Áreas temáticas: | Astronomia / física Biotecnología Ciência de alimentos Ciências agrárias i Ciências ambientais Ciências biológicas iii Engenharias i Engenharias ii Engenharias iii Engenharias iv Interdisciplinar Materiais Materials science, characterization & testing Medicina i Medicina ii Odontología Organic chemistry Polymer science Polymers and plastics Química |
| Palabras clave: | Chemical degradation Creep resistance Epoxy Polyimines Stress-relaxation Vitrimers |
| Entidad: | Universitat Rovira i Virgili |
| Fecha de alta del registro: | 2024-10-12 |
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