Next Article in Journal
Bio-Based Epoxy Resins Based on Linseed Oil Cured with Naturally Occurring Acids
Next Article in Special Issue
Influence of Filler Content and Filler Size on the Curing Kinetics of an Epoxy Resin
Previous Article in Journal
Study on the Mechanism of Interfacial Friction Heating in Polymer Ultrasonic Plasticization Injection Molding Process
Previous Article in Special Issue
On the Dielectric Behavior of Amine and Anhydride Cured Epoxy Resins Modified Using Multi-Terminal Epoxy Functional Network Modifier
Open AccessArticle

Acetoacetate Based Thermosets Prepared by Dual-Michael Addition Reactions

Thermodynamics Laboratory, ETSEIB, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, C/Marcel lí Domingo s/n, 43007 Tarragona, Spain
Author to whom correspondence should be addressed.
Polymers 2019, 11(9), 1408;
Received: 13 May 2019 / Revised: 31 July 2019 / Accepted: 1 August 2019 / Published: 27 August 2019
(This article belongs to the Special Issue Thermosets II)
A novel set of dual-curable multiacetoacetate-multiacrylate-divinyl sulfone ternary materials with versatile and manipulable properties are presented. In contrast to common dual-curing systems, the first stage polymer herein consists of a densely crosslinked, high Tg network as a result of base-catalyzed multiacetoacetate-divinyl sulfone Michael addition. A more flexible secondary network forms after base-catalyzed Michael addition of remaining multiacetoacetate to multiacrylate. Curing is truly sequential as the rates of the two Michael additions are significantly different. Curing kinetics were analyzed using differential scanning calorimetry (DSC) and Fourier-transform infrared (FTIR). The materials at each curing stage were characterized using dynamic mechanical analysis (DMA) and SEM. Although some phase separation was observed in certain formulations, the incompatibilities were minimized when the molar percentage of the acetoacetate-divinyl sulfone polymer network was above 75%. Furthermore, the environmental scanning electron microscopy (ESEM) images of these materials show that the more flexible acetoacetate-acrylate phase is dispersed in the form of polymeric spheres within the rigid acetoacetate-divinyl sulfone matrix. This unique dual microstructure can potentially render these materials highly resilient in applications requiring densely crosslinked polymer architectures with enhanced toughness. View Full-Text
Keywords: dual-curing; Michael addition; click chemistry; acetoacetate; divinyl sulfone; acrylate dual-curing; Michael addition; click chemistry; acetoacetate; divinyl sulfone; acrylate
Show Figures

Graphical abstract

MDPI and ACS Style

Konuray, O.; Fernández-Francos, X.; Ramis, X.; Serra, À. Acetoacetate Based Thermosets Prepared by Dual-Michael Addition Reactions. Polymers 2019, 11, 1408.

AMA Style

Konuray O, Fernández-Francos X, Ramis X, Serra À. Acetoacetate Based Thermosets Prepared by Dual-Michael Addition Reactions. Polymers. 2019; 11(9):1408.

Chicago/Turabian Style

Konuray, Osman; Fernández-Francos, Xavier; Ramis, Xavier; Serra, Àngels. 2019. "Acetoacetate Based Thermosets Prepared by Dual-Michael Addition Reactions" Polymers 11, no. 9: 1408.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop