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dc.contributor.authorEcheverria-Altuna, Oihane
dc.contributor.authorOllo, Olatz
dc.contributor.authorCalvo-Correas, Tamara
dc.contributor.authorHarismendy, Isabel
dc.contributor.authorEceiza, Arantxa
dc.date.accessioned2022-01-24T12:29:52Z
dc.date.available2022-01-24T12:29:52Z
dc.date.issued2022
dc.identifier.citationEcheverria-Altuna, Oihane, Olatz Ollo, Tamara Calvo-Correas, Isabel Harismendy, and Arantxa Eceiza. “Effect of the Catalyst System on the Reactivity of a Polyurethane Resin System for RTM Manufacturing of Structural Composites.” Express Polymer Letters 16, no. 3 (2022): 234–247. doi:10.3144/expresspolymlett.2022.19.en
dc.identifier.issn1788-618Xen
dc.identifier.urihttp://hdl.handle.net/11556/1259
dc.description.abstractThe high versatility of polyurethanes (PU’s) is encouraging the development of new formulations for new appli cations, like their use as a matrix for structural composites. PU’s based technology offers some advantages, such as fatigue resistance and fast curing cycles. However, their high reactivity hinders some manufacturing processes like Resin Transfer Moulding (RTM). This work aimed to achieve a PU resin (PUR) formulation with the required latency and reactivity for the RTM. For this purpose, different catalytic systems based on an epoxide and LiCl were investigated. The reactivity of the systems was evaluated through Differential Scanning Calorimetry (DSC) and rheology tests, and the curing reaction and viscosity were modelled. Furthermore, the RTM process of a representative composite part was simulated. Results demon strated the processability improvements when the LiCl was incorporated into the isocyanate component of the formulation combined with a monool or a diol. It was observed that these combinations contribute to the encapsulation of the LiCl between the as formed urethane groups by hydrogen bonding, providing the desired latency and acting as a delayed action catalyst. Once the reaction started and the encapsulation was deactivated, an alkoxide was formed to act as a catalyst. En capsulation was more effective with the diol, providing a higher latency.en
dc.description.sponsorshipWe gratefully acknowledge the Basque Government for the fi nancial support through the ELKARTEK 2020 (ProjectAVAN SITE New generation of sustainable composites for advanced manufacturing KK2020/00019) program. The authors also ac knowledge the University of the Basque Country (UPV/EHU) in the frame of GIU18/216 Research Group and the Macrobe havior-Mesostructure-Nanotechnology SGIker unit.en
dc.language.isoengen
dc.publisherBudapesti Muszaki Egyetem, Department of Polymer Engineeringen
dc.titleEffect of the catalyst system on the reactivity of a polyurethane resin system for RTM manufacturing of structural compositesen
dc.typearticleen
dc.identifier.doi10.3144/expresspolymlett.2022.19en
dc.rights.accessRightsopenAccessen
dc.subject.keywordsThermosetting resinsen
dc.subject.keywordsPolyurethaneen
dc.subject.keywordsRTMen
dc.subject.keywordsCatalysten
dc.issue.number3en
dc.journal.titleExpress Polymer Lettersen
dc.page.final247en
dc.page.initial234en
dc.volume.number16en


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