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dc.contributor.authorKonuray, Ali Osman
dc.contributor.authorDi Donato, Fabio
dc.contributor.authorSangermano, Marco
dc.contributor.authorBonada Bo, Jordi
dc.contributor.authorFernández Francos, Xavier
dc.contributor.authorSerra Albet, Maria Àngels
dc.contributor.authorRamis Juan, Xavier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria
dc.date.accessioned2020-09-30T12:13:46Z
dc.date.available2020-09-30T12:13:46Z
dc.date.issued2020-09-01
dc.identifier.citationKonuray, A. [et al.]. Dual-curable stereolithography resins for superior thermomechanical properties. "Express polymer letters", 1 Setembre 2020, vol. 14, núm. 9, p. 881-884.
dc.identifier.issn1788-618X
dc.identifier.urihttp://hdl.handle.net/2117/329558
dc.description.abstractStereolithography (SL) stands out as a relatively fast additive manufacturing method to produce thermoset components with high resolutions. The majority of SL resins consist of acrylate monomers which result in materials with curing-induced shrinkage problems and this, in addition to the incomplete and non-uniform conversions reached in the SL process, results in poor mechanical properties. To address this issue, a dual-curing formulation was developed by mixing an epoxy monomer into a commercial multi-acrylate SL resin: the first curing stage is acrylate free-radical photopolymerization at ambient temperature, and the second curing stage is cationic epoxy homopolymerization at higher temperatures. The fully dual-cured materials are macroscopically homogeneous, with nanoscale domains observed by Atomic Force Microscopy (AFM), and with unimodal tan delta peaks observed in Dynamic Mechanical Analysis (DMA). The uncured material was storage stable at ambient conditions for at least 9 weeks since the epoxy part was virtually unreactive at these temperatures. With the dual-cured materials, a nearly 10-fold increase in Young’s modulus was achieved over the neat acrylate resin. At the thermal curing stage, the presence of diperoxyketal thermal radical initiator to the liquid formulation facilitated the polymerization of unreacted acrylates that remained from the SL process simultaneously with epoxy homopolymerization and helped the material attain improved properties.
dc.format.extent4 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química orgànica
dc.subject.lcshEpoxy resins
dc.subject.lcshPolymerization
dc.subject.otherThermosetting resins
dc.subject.otherStereolithography
dc.subject.otherDual-curing
dc.subject.otherepoxy
dc.titleDual-curable stereolithography resins for superior thermomechanical properties
dc.typeArticle
dc.subject.lemacResines epoxídiques
dc.subject.lemacPolimerització
dc.contributor.groupUniversitat Politècnica de Catalunya. POLTEPO - Polímers Termoestables Epoxídics
dc.contributor.groupUniversitat Politècnica de Catalunya. REMM - Recerca en Estructures i Mecànica de Materials
dc.identifier.doi10.3144/expresspolymlett.2020.72
dc.relation.publisherversionhttp://www.expresspolymlett.com/
dc.rights.accessOpen Access
local.identifier.drac29291630
dc.description.versionPostprint (published version)
local.citation.authorKonuray, A.; Di Donato, F.; Sangermano, M.; Bonada, J.; Fernandez-Francos, X.; Serra, M. À.; Ramis, X.
local.citation.publicationNameExpress polymer letters
local.citation.volume14
local.citation.number9
local.citation.startingPage881
local.citation.endingPage884


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