Autor segons l'article: Silvia De la Flor; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; Àngels Serra; Xavier Ramis
Departament: Química Analítica i Química Orgànica Enginyeria Mecànica
Autor/s de la URV: DE LA FLOR LOPEZ, SILVIA; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; SERRA ALBET, MARIA ANGELS; Xavier Ramis
Resum: 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.
Grup de recerca: Grup d'Investigació en Enginyeria Computacional i Experimental Polimers
Àrees temàtiques: Enginyeria mecànica Ingeniería mecánica Mechanical engineering
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1759-9954
Identificador de l'autor: 0000-0002-6851-1371; 0000-0002-3492-2922; n/a; n/a; 0000-0003-1387-0358; 0000-0003-2550-7185
Data d'alta del registre: 2016-04-14
Pàgina final: 2290
Volum de revista: 7
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://pubs.rsc.org/en/content/articlelanding/2016/PY/C6PY00099A#!divAbstract
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: 10.1039/c6py00099a
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2016
Pàgina inicial: 2280
Tipus de publicació: Article Artículo Article
Repositori URV