Articles producció científica> Química Analítica i Química Orgànica

New allyl-functional catalytic comonomers for sequential thiol- Michael and radical thiol-ene reactions

  • Datos identificativos

    Identificador: imarina:5131877
    Autores:
    Konuray O., Fernández-Francos X., Ramis X., Serra À.
    Resumen:
    Soft poly(thioether) thermosets have been synthesized by employing a two-step curing procedure based on click chemistry. The first stage of curing is a thiol-Michael addition between acrylates (or methacrylates) and thiols in excess, catalyzed by a set of novel tertiary amine catalyst comonomers with allyl functionality. Subsequently, the pendant allyl groups of the comonomer get incorporated into the polymer network by undergoing thiol-ene UV photopolymerization with the remaining thiols. The strong catalysis by the high concentration of tertiary amine groups facilitates quantitative conversions at the end of the first stage. All remaining functional groups are depleted after a short period of UV irradiation. Final materials are clear, transparent, and exhibit homogeneous network structures with alpha relaxation temperatures in the range 3-25 °C. This sub-ambient relaxation temperature range suggests these materials may be suitable for coating applications where delicate substrates are involved such as plastic, wood and paper.
  • Otros:

    Autor según el artículo: Konuray O., Fernández-Francos X., Ramis X., Serra À.
    Departamento: Química Analítica i Química Orgànica
    Autor/es de la URV: Fernández Francos, Xavier / Serra Albet, Maria Angels
    Palabras clave: Thiol Michael addition Methacrylate Dual-curing Click reaction Click chemistry Acrylate
    Resumen: Soft poly(thioether) thermosets have been synthesized by employing a two-step curing procedure based on click chemistry. The first stage of curing is a thiol-Michael addition between acrylates (or methacrylates) and thiols in excess, catalyzed by a set of novel tertiary amine catalyst comonomers with allyl functionality. Subsequently, the pendant allyl groups of the comonomer get incorporated into the polymer network by undergoing thiol-ene UV photopolymerization with the remaining thiols. The strong catalysis by the high concentration of tertiary amine groups facilitates quantitative conversions at the end of the first stage. All remaining functional groups are depleted after a short period of UV irradiation. Final materials are clear, transparent, and exhibit homogeneous network structures with alpha relaxation temperatures in the range 3-25 °C. This sub-ambient relaxation temperature range suggests these materials may be suitable for coating applications where delicate substrates are involved such as plastic, wood and paper.
    Áreas temáticas: Química Polymers and plastics Polymer science Organic chemistry Medicina ii Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Biotecnología Astronomia / física
    ISSN: 00323861
    Direcció de correo del autor: angels.serra@urv.cat xavier.fernandez@urv.cat
    Identificador del autor: 0000-0003-1387-0358 0000-0002-3492-2922
    Página final: 377
    Fecha de alta del registro: 2024-09-07
    Volumen de revista: 138
    Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S0032386118300995
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Polymer. 138 369-377
    Referencia de l'ítem segons les normes APA: Konuray O., Fernández-Francos X., Ramis X., Serra À. (2018). New allyl-functional catalytic comonomers for sequential thiol- Michael and radical thiol-ene reactions. Polymer, 138(), 369-377. DOI: 10.1016/j.polymer.2018.01.073
    DOI del artículo: 10.1016/j.polymer.2018.01.073
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2018
    Página inicial: 369
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Materials Chemistry,Organic Chemistry,Polymer Science,Polymers and Plastics
    Thiol
    Michael addition
    Methacrylate
    Dual-curing
    Click reaction
    Click chemistry
    Acrylate
    Química
    Polymers and plastics
    Polymer science
    Organic chemistry
    Medicina ii
    Materials chemistry
    Materiais
    Interdisciplinar
    Farmacia
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências agrárias i
    Biotecnología
    Astronomia / física
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