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

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