Articles producció científica> Enginyeria Mecànica

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

  • Identification data

    Identifier: imarina:9228399
    Authors:
    Roig, AdriaRamis, XavierDe la Flor, SilviaSerra, Angels
    Abstract:
    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.
  • Others:

    Author, as appears in the article.: Roig, Adria; Ramis, Xavier; De la Flor, Silvia; Serra, Angels;
    Department: Enginyeria Mecànica
    URV's Author/s: De la Flor Lopez, Silvia / Roig De Arespacochaga, Anna / Serra Albet, Maria Angels
    Keywords: 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
    Abstract: 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.
    Thematic Areas: 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
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: angels.serra@urv.cat silvia.delaflor@urv.cat
    Author identifier: 0000-0003-1387-0358 0000-0002-6851-1371
    Record's date: 2024-07-27
    Journal volume: 230
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S0032386121006960?via%3Dihub
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Polymer. 230
    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
    Article's DOI: 10.1016/j.polymer.2021.124073
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2021
    Publication Type: Journal Publications
  • Keywords:

    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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