Author, as appears in the article.: Àngels Serra; Ali Osman Konuray; Xavier Fernández-Francos; Xavier Ramis
Department: Química Analítica i Química Orgànica
URV's Author/s: SERRA ALBET, MARIA ANGELS; Ali Osman Konuray; Xavier Fernández-Francos; Xavier Ramis
Keywords: aza-Michael reaction Photopolymerization
Abstract: Dual curing systems find various uses in industry with the process flexibility they provide which allows tailoring properties at different curing stages in accordance with application requirements. A safe and efficient dual curing scheme is proposed here for a set of mixtures containing different proportions of acrylates and methacrylates. The first curing stage is a stoichiometric aza-Michael addition between acrylates and an amine, followed by photo-initiated radical homopolymerization of methacrylates and remaining acrylates. An analysis of aza-Michael reaction kinetics confirmed that amines react selectively with acrylates, leaving methacrylates unreacted after the first curing stage. It was found that acrylate-rich mixtures achieve complete global conversion at the end of the scheme. However, the highest crosslinking density and thermal resistance was observed in a methacrylate-rich formulation. The resulting materials show a wide range of viscoelastic properties at both curing stages that can be tailored to a variety of industrial application needs.
Research group: Polimers
Thematic Areas: Química Química Chemistry
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0014-3057
Author identifier: 0000-0003-1387-0358; n/a; 0000-0002-3492-2922; 0000-0003-2550-7185
Record's date: 2016-10-10
Last page: 267
Journal volume: 84
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
First page: 256
Publication Type: Article Artículo Article
Repositori URV