Repositori institucional URV
| URV's Author/s: | DE LA FLOR LOPEZ, SILVIA; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; SERRA ALBET, MARIA ANGELS; Xavier Ramis |
| Author, as appears in the article.: | Silvia De la Flor; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; Àngels Serra; Xavier Ramis |
| Author identifier: | 0000-0002-6851-1371; 0000-0002-3492-2922; n/a; n/a; 0000-0003-1387-0358; 0000-0003-2550-7185 |
| Journal publication year: | 2016 |
| Publication Type: | Article |
| ISSN: | 1759-9954 |
| Abstract: | A new dual-curing system based on sequential thiol-epoxy click polycondensation and epoxy anionic homopolymerization was studied. Formulations of diglycidyl ether of bisphenol A and trimethylolpropane tris(3-mercaptopropionate) with 1-methylimidazole as a base catalyst and excess of epoxy groups were prepared and characterized. The curing process is sequential: fast thiol-epoxy polycondensation takes place first, followed by slower homopolymerization of excess epoxy groups. This makes it possible to define curing sequences with easy time-temperature control for both curing stages. The network build-up process during the first curing stage can be easily modelled assuming ideal polycondensation, which allows tailoring the structure and properties of the intermediate materials. The homopolymerization of the excess epoxy groups in the second curing stage results in a higher glass transition temperature (Tg) in comparison with the stoichiometric thiol-epoxy material, thus extending the application of thiol-epoxy thermosets to wider temperature ranges. |
| Article's DOI: | 10.1039/c6py00099a |
| Link to the original source: | https://pubs.rsc.org/en/content/articlelanding/2016/PY/C6PY00099A#!divAbstract |
| Papper version: | info:eu-repo/semantics/publishedVersion |
| licence for use: | https://creativecommons.org/licenses/by/3.0/es/ |
| Department: | Química Analítica i Química Orgànica Enginyeria Mecànica |
| Research group: | Grup d'Investigació en Enginyeria Computacional i Experimental Polimers |
| Licence document URL: | https://repositori.urv.cat/ca/proteccio-de-dades/ |
| Thematic Areas: | Mechanical engineering |
| Entity: | Universitat Rovira i Virgili |
| Record's date: | 2016-04-14 |
| First page: | 2280 |
| Last page: | 2290 |
| Journal volume: | 7 |
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| DocumentPrincipal | DocumentPrincipal | application/pdf |
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