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Comportamiento a fractura de dos grados comerciales PLA: influencia de la estructura cristalina

Authors: Gamez Pérez, José; Velázquez Infante, Julio Cesar; Franco Urquiza, Edgar Adrian; Velasco Perero, José Ignacio; Maspoch Rulduà, M. Lluïsa;

Comportamiento a fractura de dos grados comerciales PLA: influencia de la estructura cristalina

Abstract

En este trabajo se ha estudiado el efecto de un tratamiento de rejuvenecimiento aplicado a láminas obtenidas por extrusión-calandra a partir de dos grados comerciales de PLA, con diferentes purezas ópticas. Se han evaluado las propiedades térmicas mediante calorimetría diferencial de barrido (DSC), las propiedades mecánicas, mediante ensayos a tracción y el comportamiento a fractura con la técnica del trabajo esencial de fractura (EWF). El tratamiento de rejuvenecimiento provoca un aumento del volumen libre de las cadenas, que se manifiesta en un descenso de la temperatura de transición vítrea (Tg) y una disminución de la rigidez y tensión a cedencia con un aumento significativo de la ductilidad. Este incremento en la ductilidad permitió la aplicación de la técnica del EWF, pudiendo relacionar los parámetros obtenidos con la caracterización térmica y mecánica.

Peer Reviewed

Country
Spain
Related Organizations
Keywords

Polímers -- Fractura, Polymers--Thermal properties, Polímers -- Propietats tèrmiques, Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaig de fractura, Polymers--Fracture, Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers, Polymers--Mechanical properties, Polímers -- Propietats mecàniques

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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