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