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UV generation of a multifunctional hyperbranched thermal crosslinker to cure epoxy resins
Foix, David; Ramis Juan, Xavier; Serra Albet, Àngels; Sangermano, Marco
Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. POLTEPO - Polímers Termoestables Epoxídics
A new hyperbranched polymer (HBP) was obtained via an iterative synthetic procedure that consists of esterification and thiol-ene click reaction. This polymer was used as a latent multifunctional macroinitiator for the dual curing of a commercially available cycloaliphatic epoxy resin and this process was studied by photo-DSC and FTIR. The presence of thioether groups in the HBP structure leads, by photoirradiation, to the formation of sulfonium salts, which are thermal cationic initiating species. The materials obtained were characterized by DMTA, TGA, gel content and FESEM. By means of the last technique domains of HBP as a second phase within the epoxy matrix were observed.
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Epoxy resins
Hyperbranched polymers
UV curing
Epoxy resin
Resines epoxídiques
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Article
Elsevier
         

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