Author, as appears in the article.: Telatin T; De la Flor S; Serra À; Montané X
Department: Química Analítica i Química Orgànica
URV's Author/s: De la Flor Lopez, Silvia / Montané Montané, Xavier / Serra Albet, Maria Angels / Telatin, Tommaso
Keywords: Chemical degradation Creep resistance Epoxy Polyimines Stress-relaxation Vitrimers
Abstract: 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.
Thematic Areas: 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
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: silvia.delaflor@urv.cat xavier.montane@urv.cat tommaso.telatin@urv.cat angels.serra@urv.cat
Author identifier: 0000-0002-6851-1371 0000-0002-1426-239X 0000-0003-1387-0358
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S0142941824001429?via%3Dihub
Papper original source: Polymer Testing. 135
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
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1016/j.polymertesting.2024.108465
Entity: Universitat Rovira i Virgili
Journal publication year: 2024
Publication Type: Journal Publications