Articles producció científica> Enginyeria Mecànica

Acetoacetate based thermosets prepared by dual-Michael addition reactions

  • Datos identificativos

    Identificador: imarina:5864935
    Autores:
    Konuray, OsmanFernandez-Francos, XavierRamis, XavierSerra, Angels
    Resumen:
    © 2019 by the authors. Anovel set of dual-curable multiacetoacetate-multiacrylate-divinyl sulfone ternary materials with versatile and manipulable properties are presented. In contrast to common dual-curing systems, the first stage polymer herein consists of a densely crosslinked, high Tg network as a result of base-catalyzed multiacetoacetate-divinyl sulfone Michael addition. A more flexible secondary network forms after base-catalyzed Michael addition of remaining multiacetoacetate to multiacrylate. Curing is truly sequential as the rates of the two Michael additions are significantly different. Curing kinetics were analyzed using differential scanning calorimetry (DSC) and Fourier-transform infrared (FTIR). The materials at each curing stage were characterized using dynamic mechanical analysis (DMA) and SEM. Although some phase separation was observed in certain formulations, the incompatibilities were minimized when the molar percentage of the acetoacetate-divinyl sulfone polymer network was above 75%. Furthermore, the environmental scanning electron microscopy (ESEM) images of these materials show that the more flexible acetoacetate-acrylate phase is dispersed in the form of polymeric spheres within the rigid acetoacetate-divinyl sulfone matrix. This unique dual microstructure can potentially render these materials highly resilient in applications requiring densely crosslinked polymer architectures with enhanced toughness.
  • Otros:

    Autor según el artículo: Konuray, Osman; Fernandez-Francos, Xavier; Ramis, Xavier; Serra, Angels
    Departamento: Enginyeria Mecànica
    e-ISSN: 2073-4360
    Autor/es de la URV: Fernández Francos, Xavier / Serra Albet, Maria Angels / Serra Masdeu, Anna Isabel Maria
    Palabras clave: Thiol-acrylate Photopolymerization Networks Michael addition Kinetics Free-radical polymerization Epoxy thermosets Dual-curing Divinyl sulfone Click chemistry Acrylate Acetoacetate michael addition divinyl sulfone click chemistry acrylate acetoacetate
    Resumen: © 2019 by the authors. Anovel set of dual-curable multiacetoacetate-multiacrylate-divinyl sulfone ternary materials with versatile and manipulable properties are presented. In contrast to common dual-curing systems, the first stage polymer herein consists of a densely crosslinked, high Tg network as a result of base-catalyzed multiacetoacetate-divinyl sulfone Michael addition. A more flexible secondary network forms after base-catalyzed Michael addition of remaining multiacetoacetate to multiacrylate. Curing is truly sequential as the rates of the two Michael additions are significantly different. Curing kinetics were analyzed using differential scanning calorimetry (DSC) and Fourier-transform infrared (FTIR). The materials at each curing stage were characterized using dynamic mechanical analysis (DMA) and SEM. Although some phase separation was observed in certain formulations, the incompatibilities were minimized when the molar percentage of the acetoacetate-divinyl sulfone polymer network was above 75%. Furthermore, the environmental scanning electron microscopy (ESEM) images of these materials show that the more flexible acetoacetate-acrylate phase is dispersed in the form of polymeric spheres within the rigid acetoacetate-divinyl sulfone matrix. This unique dual microstructure can potentially render these materials highly resilient in applications requiring densely crosslinked polymer architectures with enhanced toughness.
    Áreas temáticas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734360
    Direcció de correo del autor: angels.serra@urv.cat xavier.fernandez@urv.cat annaisabel.serra@urv.cat
    Identificador del autor: 0000-0003-1387-0358 0000-0002-3492-2922 0000-0001-9353-7154
    Fecha de alta del registro: 2024-11-02
    Volumen de revista: 11
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.mdpi.com/2073-4360/11/9/1408
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Polymers. 11 (9): 1408-
    Referencia de l'ítem segons les normes APA: Konuray, Osman; Fernandez-Francos, Xavier; Ramis, Xavier; Serra, Angels (2019). Acetoacetate based thermosets prepared by dual-Michael addition reactions. Polymers, 11(9), 1408-. DOI: 10.3390/polym11091408
    DOI del artículo: 10.3390/polym11091408
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2019
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Chemistry (Miscellaneous),Polymer Science,Polymers and Plastics
    Thiol-acrylate
    Photopolymerization
    Networks
    Michael addition
    Kinetics
    Free-radical polymerization
    Epoxy thermosets
    Dual-curing
    Divinyl sulfone
    Click chemistry
    Acrylate
    Acetoacetate
    michael addition
    divinyl sulfone
    click chemistry
    acrylate
    acetoacetate
    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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