Autor según el artículo: Konuray A., Ruiz A., Morancho J., Salla J., Fernández-Francos X., Serra À., Ramis X.

Departamento: Química Analítica i Química Orgànica

Autor/es de la URV: Fernández Francos, Xavier / Serra Albet, Maria Angels

Palabras clave: Thermosets Michael addition Free-radical polymerization Dual-curing Crosslinking Click chemistry Acrylates Acrylate Acetoacetate

Resumen: A new family of poly(keto ester)-poly(methacrylate) thermosets based on off-stoichiometric acetoacetate-acrylate/methacrylate formulations has been prepared and characterized. The first stage of curing is a self-limiting click Michael addition between acetoacetate and acrylate groups at room temperature and the second stage is a methacrylate radical photopolymerization. An analysis of the reaction kinetics confirmed that acetoacetate reacts selectively with acrylates, leaving methacrylates completely unreacted after the first curing stage. It was found that acrylate-rich mixtures achieve complete conversion at the end of both curing stages. In methacrylate-rich formulations the dilution effect of this monomer leads to a slow curing rate and a certain amount of unreacted acrylates in the first curing stage, which react completely after irradiation in the second curing stage. The prepared materials are gelled after acetoacetate/acrylate Michael addition and show a wide range of properties at both curing stages that can be tailored by changing the relative contribution of the Michael and radical vinyl homopolymerization reactions. The latency of the formulations at the beginning of the second stage can be regulated as desired by irradiation.

Áreas temáticas: Química Polymers and plastics Polymer science Physics and astronomy (miscellaneous) Physics and astronomy (all) Organic chemistry Odontología Materials chemistry Materiais Interdisciplinar General physics and astronomy Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências ambientais Ciência de alimentos Ciência da computação Biotecnología Astronomia / física Arquitetura, urbanismo e design

ISSN: 00143057

Direcció de correo del autor: xavier.fernandez@urv.cat angels.serra@urv.cat

Identificador del autor: 0000-0002-3492-2922 0000-0003-1387-0358

Página final: 46

Fecha de alta del registro: 2023-02-18

Volumen de revista: 98

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S0014305717304391

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: European Polymer Journal. 98 39-46

Referencia de l'ítem segons les normes APA: Konuray A., Ruiz A., Morancho J., Salla J., Fernández-Francos X., Serra À., Ramis X. (2018). Sequential dual curing by selective Michael addition and free radical polymerization of acetoacetate-acrylate-methacrylate mixtures. European Polymer Journal, 98(), 39-46. DOI: 10.1016/j.eurpolymj.2017.11.003

DOI del artículo: 10.1016/j.eurpolymj.2017.11.003

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2018

Página inicial: 39

Tipo de publicación: Journal Publications