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dc.contributor.authorLagunas Calpe, Carlos
dc.contributor.authorFernández Francos, Xavier
dc.contributor.authorFerrando Piera, Francesc
dc.contributor.authorFlores Guillen, Marjorie
dc.contributor.authorSerra Albet, Àngels
dc.contributor.authorMorancho Llena, José María
dc.contributor.authorSalla Tarragó, José María
dc.contributor.authorRamis Juan, Xavier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.identifier.citationLagunas, C. [et al.]. New epoxy thermosets modified with amphiphilic multiarm star polymers as toughness enhancer. "Reactive and functional polymers", 01 Octubre 2014, vol. 83, p. 132-143.
dc.description.abstractThe synthesis and characterization of two novel amphiphilic multiarm star polymers with linear polyethylene glycol (PEG) and poly(s-caprolactone) (PCL) arms and their use as toughening modifiers of epoxy anhydride thermosets are reported. The new star polymers were obtained by partial pegylation of a hyperbranched polyester and subsequent growth of PCL arms. The curing process was studied by calorimetry and thermomechanical analysis, demonstrating the accelerating effect and the influence on gelation of the hydroxyl terminal groups. The curing kinetics was analyzed by model-free and model-fitting methods. The final properties of the resulting materials were determined by thermal and mechanical tests. The addition of the star-like modifiers led only to notable improvement on impact strength in the material containing a 10% of the star with PCL and PEG arms, without compromising glass transition temperature and thermal stability. The morphology of the resulting materials depended on the structure of the toughness modifier used, as demonstrated by electron microscopy, but all modified thermosets obtained showed phase-separated morphologies with nanosized particles. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent12 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.subject.lcshEpoxy resins
dc.subject.otherStar polymers
dc.subject.otherEpoxy resin
dc.titleNew epoxy thermosets modified with amphiphilic multiarm star polymers as toughness enhancer
dc.subject.lemacResines epoxídiques
dc.contributor.groupUniversitat Politècnica de Catalunya. TERFIQ - Grup de Termodinàmica i Fisico-Química
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorLagunas, C.; Fernández, X.; Ferrando, F.; Flores, Marjorie; Serra, À.; Morancho, J.; Salla, J.; Ramis, X.
local.citation.publicationNameReactive and functional polymers

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