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dc.contributor.authorGamez Pérez, José
dc.contributor.authorVelázquez Infante, Julio César
dc.contributor.authorFranco Urquiza, Edgar Adrian
dc.contributor.authorPagès Figueras, Pere
dc.contributor.authorCarrasco, F
dc.contributor.authorSantana Pérez, Orlando Onofre
dc.contributor.authorMaspoch Rulduà, M. Lluïsa
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2014-05-06T12:57:10Z
dc.date.created2011-01
dc.date.issued2011-01
dc.identifier.citationGamez, J. [et al.]. Fracture behavior of quenched poly(lactic acid). "Express polymer letters", Gener 2011, vol. 5, núm. 1, p. 82-91.
dc.identifier.issn1788-618X
dc.identifier.urihttp://hdl.handle.net/2117/22850
dc.description.abstractThe effect of a quenching treatment applied on heated cast sheet extruded films of two poly(lactic acid) (PLA) commercial grades, with different optical purities, was studied. The thermal and mechanical properties of the films, as well as their fracture behavior, were assessed by differential scanning calorimetry (DSC), tensile tests, and the essential work of fracture (EWF) approach. The heating-quenching treatment causes a de-aging effect with an increase in the free volume of polymer chains evidenced by a decrease in the glass transition temperature (Tg) and a decrease in the tensile stiffness and yield stress. As a result, there is an abrupt increase in ductility, finding a dramatic change in the fracture behavior, from brittle to ductile. The use of digital image correlation (DIC) of the strain field analysis during fracture testing has allowed relating the decrease on the yield stress promoted by quenching with the crack propagation kinetics. The use of the EWF method to characterize the fracture toughness of PLA has allowed to measure this enhancement on toughness, finding that the specific essential work of fracture (we) and the plastic term (!wp) parameters increased 120% and 1200%, respectively, after the quenching process.
dc.format.extent10 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaig de fractura
dc.subject.lcshPolymers--Testing
dc.subject.lcshPolymers--Mechanical properties
dc.subject.othermechanical properties
dc.subject.otherpoly(lactic acid) PLA
dc.subject.otheressential work of fracture (EWF)
dc.subject.otherphysical aging
dc.titleFracture behavior of quenched poly(lactic acid)
dc.typeArticle
dc.subject.lemacPolímers -- Propietats mecàniques
dc.subject.lemacPolímers -- Fractura -- Proves
dc.contributor.groupUniversitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia
dc.identifier.doi10.3144/expresspolymlett.2011.9
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac5237101
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorGamez, J.; Velázquez-Infante, J.C.; E Franco-Urquiza; Pages, P.; Carrasco, F.; Santana, O.; Maspoch, M.
local.citation.publicationNameExpress polymer letters
local.citation.volume5
local.citation.number1
local.citation.startingPage82
local.citation.endingPage91


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