Articles producció científica> Enginyeria Mecànica

Epoxy-Based Shape-Memory Actuators Obtained via Dual-Curing of Off-Stoichiometric 'Thiol-Epoxy' Mixtures

  • Identification data

    Identifier: imarina:5130891
  • Authors:

    Belmonte, Alberto
    Russo, Claudio
    Ambrogi, Veronica
    Fernandez-Francos, Xavier
    De la Flor, Silvia
  • Others:

    Author, as appears in the article.: Belmonte, Alberto; Russo, Claudio; Ambrogi, Veronica; Fernandez-Francos, Xavier; De la Flor, Silvia
    Department: Enginyeria Mecànica
    e-ISSN: 2073-4360
    URV's Author/s: Fernández Francos, Xavier
    Keywords: Unconstrained thiol–epoxy shape-memory polymer partially-constrained fully-constrained dual-curing click chemistry actuator
    Abstract: In this work, epoxy-based shape-memory actuators have been developed by taking advantage of the sequential dual-curing of off-stoichiometric "thiol-epoxy" systems. Bent-shaped designs for flexural actuation were obtained thanks to the easy processing of these materials in the intermediate stage (after the first curing process), and successfully fixed through the second curing process. The samples were programmed into a flat temporary-shape and the recovery-process was analyzed in unconstrained, partially-constrained and fully-constrained conditions using a dynamic mechanical analyzer (DMA). Different "thiol-epoxy" systems and off-stoichiometric ratios were used to analyze the effect of the network structure on the actuation performance. The results evidenced the possibility to take advantage of the flexural recovery as a potential actuator, the operation of which can be modulated by changing the network structure and properties of the material. Under unconstrained-recovery conditions, faster and narrower recovery-processes (an average speed up to 80%/min) are attained by using materials with homogeneous network structure, while in partially- or fully-constrained conditions, a higher crosslinking density and the presence of crosslinks of higher functionality lead to a higher amount of energy released during the recovery-process, thus, increasing the work or the force released. Finally, an easy approach for the prediction of the work released by the shape-memory actuator has been proposed.
    Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734360
    Author's mail: xavier.fernandez@urv.cat
    Author identifier: 0000-0002-3492-2922
    Record's date: 2024-09-07
    Journal volume: 9
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2073-4360/9/3/113
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Polymers. 9 (3):
    APA: Belmonte, Alberto; Russo, Claudio; Ambrogi, Veronica; Fernandez-Francos, Xavier; De la Flor, Silvia (2017). Epoxy-Based Shape-Memory Actuators Obtained via Dual-Curing of Off-Stoichiometric 'Thiol-Epoxy' Mixtures. Polymers, 9(3), -. DOI: 10.3390/polym9030113
    Article's DOI: 10.3390/polym9030113
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2017
    First page: 113
    Publication Type: Journal Publications
  • Keywords:

    Chemistry (Miscellaneous),Polymer Science,Polymers and Plastics
    Unconstrained
    thiol–epoxy
    shape-memory polymer
    partially-constrained
    fully-constrained
    dual-curing
    click chemistry
    actuator
    Polymers and plastics
    Polymer science
    Odontología
    General chemistry
    Farmacia
    Engenharias ii
    Ciências biológicas ii
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Astronomia / física
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