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