Author, as appears in the article.: Guzmán D., Mateu B., Fernández-Francos X., Ramis X., Serra A.

Department: Química Analítica i Química Orgànica

URV's Author/s: Fernández Francos, Xavier / Serra Albet, Maria Angels

Keywords: Thiol–epoxy Thiol-epoxy Thermosets Squalene Eugenol Epoxy resins Cycloaliphatic epoxides Crosslinking Click chemistry Click

Abstract: Novel thermosets were prepared by the base-catalysed reaction between a cycloaliphatic resin (ECC) and various thiol crosslinkers. 4-(N,N-Dimethylaminopyridine) (DMAP) was used as base catalyst for the thiol-epox y reaction. A commercial tetrathiol (PETMP) and three different thiols synthesized by us, 6SH-SQ, 3SH-EU and 3SH-ISO, were tested. 6SH-SQ and 3SH-EU were prepared from vinyl or allyl compounds from renewable resources such as squalene and eugenol, respectively. Thiol 3SH-ISO was prepared starting from commercially available triallyl isocyanurate. A kinetic study of the mixtures was performed using differential scanning calorimetr y. Stoichiometric ECC/thiol/DMAP formulations were cured at 120 ∘ Cfor1h,at 150 ∘ C for 1 h and post-cured for 30 min at 200 ∘ C. The materials were characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis and dynamic mechanical thermal analysis. The results revealed that the materials obtained from the synthesized thiols had higher thermal stability and glass transition temperatures than those obtained from the commercial PETMP. In addition, all the materials obtained exhibited very good transparency. This study proves the ability of multifunctional thiols to crosslink cycloaliphatic epoxy resins, leading to more flexible materials than those obtained by cationic homopolymerization of ECC or base- catalysed ECC-anhydride copolymerization.

Thematic Areas: Química Polymers and plastics Polymer science Organic chemistry Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciência de alimentos Biotecnología Biodiversidade Astronomia / física

ISSN: 09598103

Author's mail: xavier.fernandez@urv.cat angels.serra@urv.cat

Author identifier: 0000-0002-3492-2922 0000-0003-1387-0358

Last page: 1707

Record's date: 2023-02-18

Journal volume: 66

Papper version: info:eu-repo/semantics/acceptedVersion

Link to the original source: https://onlinelibrary.wiley.com/doi/abs/10.1002/pi.5336

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Polymer International. 66 (12): 1697-1707

APA: Guzmán D., Mateu B., Fernández-Francos X., Ramis X., Serra A. (2017). Novel thermal curing of cycloaliphatic resins by thiol-epoxy click process with several multifunctional thiols. Polymer International, 66(12), 1697-1707. DOI: 10.1002/pi.5336

Article's DOI: 10.1002/pi.5336

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

First page: 1697

Publication Type: Journal Publications