Autor según el artículo: Silvia De la Flor; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; Àngels Serra; Xavier Ramis
Departamento: Química Analítica i Química Orgànica Enginyeria Mecànica
Autor/es de la URV: DE LA FLOR LOPEZ, SILVIA; Xavier Fernández-Francos; Ali-Osman Konuray; Alberto Belmonte; SERRA ALBET, MARIA ANGELS; Xavier Ramis
Resumen: 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.
Grupo de investigación: Grup d'Investigació en Enginyeria Computacional i Experimental Polimers
Áreas temáticas: Enginyeria mecànica Ingeniería mecánica Mechanical engineering
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1759-9954
Identificador del autor: 0000-0002-6851-1371; 0000-0002-3492-2922; n/a; n/a; 0000-0003-1387-0358; 0000-0003-2550-7185
Fecha de alta del registro: 2016-04-14
Página final: 2290
Volumen de revista: 7
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://pubs.rsc.org/en/content/articlelanding/2016/PY/C6PY00099A#!divAbstract
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI del artículo: 10.1039/c6py00099a
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2016
Página inicial: 2280
Tipo de publicación: Article Artículo Article
Repositori URV