Articles producció científica> Química Analítica i Química Orgànica

Poly(epoxy-imine) vitrimers. Effect of the structure on the stress relaxation and creep resistance

  • Identification data

    Identifier: imarina:9369181
    Authors:
    Telatin TDe la Flor SSerra ÀMontané X
    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.
  • Others:

    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
  • Keywords:

    Materials Science, Characterization & Testing,Organic Chemistry,Polymer Science,Polymers and Plastics
    Chemical degradation
    Creep resistance
    Epoxy
    Polyimines
    Stress-relaxation
    Vitrimers
    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
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