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dc.contributor.authorGamez Pérez, José
dc.contributor.authorNascimento, L.
dc.contributor.authorBou Serra, Jordi
dc.contributor.authorFranco Urquiza, Edgar Adrian
dc.contributor.authorSantana Pérez, Orlando Onofre
dc.contributor.authorCarrasco Alonso, Félix Ángel
dc.contributor.authorMaspoch Rulduà, Mª Lluïsa
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.identifier.citationGamez, J. [et al.]. Influence of crystallinity on the fracture toughness of poly(lactic acid)/montmorillonite nanocomposites prepared by twin-screw extrusion. "Journal of applied polymer science", 15 Abril 2011, vol. 120, núm. 2, p. 896-905.
dc.description.abstractThe aim of this work was to study the effect of crystallinity degree on the thermal, mechanical, and fracture properties of poly(lactic acid)/organomodified montmorillonite (PLA/OMMT) nanocomposites. Samples with two different compositions (0.5 and 2.5% weight OMMT in PLA) were prepared by melt mixing in a twin-screw extruder and injection molding. An annealing treatment was applied to increase the percentage of PLA crystallinity. The thermal behavior was analyzed by differential scanning calorimetry (DSC), and the mechanical properties were determined via tensile tests and the fracture behavior using the linear elastic fracture mechanics theory, using SENB specimens at low and high testing rates. Gel permeation chromatography (GPC) from granulates and injected specimens were also carried out, finding some polymer degradation during extrusion and injection processes. The results show a toughening effect of the nanocomposites on amorphous specimens but embrittlement on the annealed ones.
dc.format.extent10 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.titleInfluence of crystallinity on the fracture toughness of poly(lactic acid)/montmorillonite nanocomposites prepared by twin-screw extrusion
dc.subject.lemacPolímers -- Propietats
dc.contributor.groupUniversitat Politècnica de Catalunya. ENGIBIO - Enginyeria i Biotecnologia
dc.contributor.groupUniversitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorGamez, J.; Nascimento, L.; Bou, J.; E Franco-Urquiza; Santana, O.; Carrasco, F.; Maspoch, M.
local.citation.publicationNameJournal of applied polymer science

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