Preparation and characterization of dual-curable off-stoichiometric amine-epoxy thermosets with latent reactivity

POLYMER

卷:146

Article

Konuray, Osman¹  Areny, Nuria¹  Morancho, Jose M.¹  Fernandez-Francos, Xavier¹  Serra, Angels²  Ramis, Xavier¹ 

[1] ETSEIB Univ Politecn Catalunya, Thermodynam Lab, Av Diagonal 647, Barcelona 08028, Spain

[2] Univ Rovira i Virgili, Dept Analyt & Organ Chem, C Marcel li Domingo S-N,Edif N4, Tarragona 43007, Spain

关键词: Epoxy;    Diamine;    Dual-curing;    Latent base;    Thermosets;   

DOI  :  10.1016/j.polymer.2018.05.040

来源: Elsevier

【 摘 要 】

A new family of dual-curable poly(hydroxyamine)-poly(ether) thermosets based on off-stoichiometric amine-epoxy formulations has been prepared and characterized. The first curing stage was a self-limiting click epoxy-amine polycondensation with an excess of epoxides and the second stage was an anionic homopolymerization of the unreacted epoxy groups, initiated by a latent base. The curing process was sequential with storage stable intermediate materials. The latency of these partially-cured intermediate materials was established not only by a thermally activated base generator, but also by the vitrification of the formulations. The intermediate and final materials exhibit a wide range of properties depending on the relative contribution of both curing stages. Intermediate materials can either be shape conformable solids, or liquids that are applicable as adhesives. Fully cured materials exhibit shape-memory effect. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free