Articles producció científica> Enginyeria Mecànica

Sequential photo-thermal curing of (meth)acrylate-epoxy thiol formulations

  • Dades identificatives

    Identificador: imarina:9228399
    Autors:
    Roig, AdriaRamis, XavierDe la Flor, SilviaSerra, Angels
    Resum:
    In this work, a novel dual-curing procedure has been developed. It is a combination of a first radical UV-initiated thiol-(meth)acrylate reaction, followed by a second thermal thiol-epoxy step catalysed by a base. Since (meth) acrylates can lead to homopolymerization by radical mechanism, the amount of thiol has to be optimized to reach cross-linked materials with Tgs above room temperature and good mechanical performance. It should be considered, that if the amount of thiol in the intermediate materials is too low, epoxy homopolymerization can take place during the second step. The use of glycidyl methacrylate in combination with trifunctional meth (acrylates) allows this system to gel in the 1st stage and avoids possible dripping or exudation of free monomers during the storage of the intermediate materials. Moreover, this compound reacts in both stages acting as a covalent coupling between (meth)acrylates and epoxy networks. We selected trimethylolpropane tris(3mercaptopropionate) as the thiol, 2,2-dimethoxy-2-phenylacetophenone as UV initiator and 1-methylimidazole as the base catalyst. The curing evolution was studied by DSC and FTIR. All the materials obtained were characterized by thermogravimetry, thermomechanical analysis and tensile tests.
  • Altres:

    Autor segons l'article: Roig, Adria; Ramis, Xavier; De la Flor, Silvia; Serra, Angels;
    Departament: Enginyeria Mecànica
    Autor/s de la URV: De la Flor Lopez, Silvia / Roig De Arespacochaga, Anna / Serra Albet, Maria Angels
    Paraules clau: Uv-curing Uv Thiol-epoxy Thiol-enes Thiol-ene Thermogravimetric analysis Thermal curing Tensile testing Systems Salts Photo-thermal Intermediate materials Homopolymerizations Glycidylmethacrylate Glycidyl methacrylate Epoxy Ene Dual-curing Dual curing Curing Crosslinking Composites Acrylic monomers
    Resum: In this work, a novel dual-curing procedure has been developed. It is a combination of a first radical UV-initiated thiol-(meth)acrylate reaction, followed by a second thermal thiol-epoxy step catalysed by a base. Since (meth) acrylates can lead to homopolymerization by radical mechanism, the amount of thiol has to be optimized to reach cross-linked materials with Tgs above room temperature and good mechanical performance. It should be considered, that if the amount of thiol in the intermediate materials is too low, epoxy homopolymerization can take place during the second step. The use of glycidyl methacrylate in combination with trifunctional meth (acrylates) allows this system to gel in the 1st stage and avoids possible dripping or exudation of free monomers during the storage of the intermediate materials. Moreover, this compound reacts in both stages acting as a covalent coupling between (meth)acrylates and epoxy networks. We selected trimethylolpropane tris(3mercaptopropionate) as the thiol, 2,2-dimethoxy-2-phenylacetophenone as UV initiator and 1-methylimidazole as the base catalyst. The curing evolution was studied by DSC and FTIR. All the materials obtained were characterized by thermogravimetry, thermomechanical analysis and tensile tests.
    Àrees temàtiques: 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
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: angels.serra@urv.cat silvia.delaflor@urv.cat
    Identificador de l'autor: 0000-0003-1387-0358 0000-0002-6851-1371
    Data d'alta del registre: 2024-07-27
    Volum de revista: 230
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0032386121006960?via%3Dihub
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Polymer. 230
    Referència de l'ítem segons les normes APA: Roig, Adria; Ramis, Xavier; De la Flor, Silvia; Serra, Angels; (2021). Sequential photo-thermal curing of (meth)acrylate-epoxy thiol formulations. Polymer, 230(), -. DOI: 10.1016/j.polymer.2021.124073
    DOI de l'article: 10.1016/j.polymer.2021.124073
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2021
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Materials Chemistry,Organic Chemistry,Polymer Science,Polymers and Plastics
    Uv-curing
    Uv
    Thiol-epoxy
    Thiol-enes
    Thiol-ene
    Thermogravimetric analysis
    Thermal curing
    Tensile testing
    Systems
    Salts
    Photo-thermal
    Intermediate materials
    Homopolymerizations
    Glycidylmethacrylate
    Glycidyl methacrylate
    Epoxy
    Ene
    Dual-curing
    Dual curing
    Curing
    Crosslinking
    Composites
    Acrylic monomers
    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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