Articles producció científica> Enginyeria Mecànica

Effect of the network structure and programming temperature on the shape-memory response of thiol-epoxy 'click' systems

  • Identification data

    Identifier: imarina:5129228
    Authors:
    Belmonte, Alberto Guzman, Dailyn Fernandez-Francos, Xavier De la Flor, Silvia
    Abstract:
    This paper presents a new methodology to develop 'thiol-epoxy' shape-memory polymers (SMPs) with enhanced mechanical properties in a simple and efficient manner via 'click' chemistry by using thermal latent initiators. The shape-memory response (SMR), defined by the mechanical capabilities of the SMP (high ultimate strength and strain), the shape-fixation and the recovery of the original shape (shape-recovery), was analyzed on thiol-epoxy systems by varying the network structure and programming temperature. The glass transition temperature (Tg) and crosslinking density were modified using 3- or 4- functional thiol curing agents and different amounts of a rigid triglycidyl isocyanurate compound. The relationship between the thermo-mechanical properties, network structure and the SMR was evidenced by means of qualitative and quantitative analysis. The influence of the programming temperature (Tprog) on the SMR was also analyzed in detail. The results demonstrate the possibility of tailoring SMPs with enhanced mechanical capabilities and excellent SMR, and intend to provide a better insight into the relationship between the network structure properties, programming temperature and the SMR of unconstrained (stress-free) systems; thus, making it easier to decide between different SMP and to define the operative parameters in the useful life.
  • Others:

    Author, as appears in the article.: Belmonte, Alberto Guzman, Dailyn Fernandez-Francos, Xavier De la Flor, Silvia
    Department: Enginyeria Mecànica
    e-ISSN: 2073-4360
    URV's Author/s: De la Flor Lopez, Silvia / Fernández Francos, Xavier
    Keywords: Thiol Shape-memory polymer Epoxy Click chemistry
    Abstract: This paper presents a new methodology to develop 'thiol-epoxy' shape-memory polymers (SMPs) with enhanced mechanical properties in a simple and efficient manner via 'click' chemistry by using thermal latent initiators. The shape-memory response (SMR), defined by the mechanical capabilities of the SMP (high ultimate strength and strain), the shape-fixation and the recovery of the original shape (shape-recovery), was analyzed on thiol-epoxy systems by varying the network structure and programming temperature. The glass transition temperature (Tg) and crosslinking density were modified using 3- or 4- functional thiol curing agents and different amounts of a rigid triglycidyl isocyanurate compound. The relationship between the thermo-mechanical properties, network structure and the SMR was evidenced by means of qualitative and quantitative analysis. The influence of the programming temperature (Tprog) on the SMR was also analyzed in detail. The results demonstrate the possibility of tailoring SMPs with enhanced mechanical capabilities and excellent SMR, and intend to provide a better insight into the relationship between the network structure properties, programming temperature and the SMR of unconstrained (stress-free) systems; thus, making it easier to decide between different SMP and to define the operative parameters in the useful life.
    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 silvia.delaflor@urv.cat
    Author identifier: 0000-0002-3492-2922 0000-0002-6851-1371
    Last page: 2164
    Record's date: 2024-09-07
    Journal volume: 7
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2073-4360/7/10/1505
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Polymers. 7 (10): 2146-2164
    APA: Belmonte, Alberto Guzman, Dailyn Fernandez-Francos, Xavier De la Flor, Silvia (2015). Effect of the network structure and programming temperature on the shape-memory response of thiol-epoxy 'click' systems. Polymers, 7(10), 2146-2164. DOI: 10.3390/polym7101505
    Article's DOI: 10.3390/polym7101505
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2015
    First page: 2146
    Publication Type: Journal Publications
  • Keywords:

    Chemistry (Miscellaneous),Polymer Science,Polymers and Plastics
    Thiol
    Shape-memory polymer
    Epoxy
    Click chemistry
    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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