Autor segons l'article: Konuray A., Ruiz A., Morancho J., Salla J., Fernández-Francos X., Serra À., Ramis X.
Departament: Química Analítica i Química Orgànica
Autor/s de la URV: Fernández Francos, Xavier / Serra Albet, Maria Angels
Paraules clau: Thermosets Michael addition Free-radical polymerization Dual-curing Crosslinking Click chemistry Acrylates Acrylate Acetoacetate
Resum: 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.
Àrees temàtiques: 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
Adreça de correu electrònic de l'autor: angels.serra@urv.cat xavier.fernandez@urv.cat
Identificador de l'autor: 0000-0003-1387-0358 0000-0002-3492-2922
Pàgina final: 46
Data d'alta del registre: 2024-09-07
Volum de revista: 98
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/abs/pii/S0014305717304391
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: European Polymer Journal. 98 39-46
Referència 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 de l'article: 10.1016/j.eurpolymj.2017.11.003
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2018
Pàgina inicial: 39
Tipus de publicació: Journal Publications
Repositori URV