Tesi etd-01312018-114958 |
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Tipo di tesi
Tesi di laurea magistrale
Autore
BOTONI, GIULIA
URN
etd-01312018-114958
Titolo
Biodegradable PLA/PBAT blends: mechanical properties, morphology and modeling of energy dissipation during fracture
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA CHIMICA
Relatori
relatore Prof. Lazzeri, Andrea
controrelatore Prof. Polacco, Giovanni
controrelatore Prof. Polacco, Giovanni
Parole chiave
- Fracture Mechanics
- PBAT (polybutylene adipate terephthalate)
- PLA (poly-lactic acid)
- SEM microscopy
- tensile test
Data inizio appello
02/03/2018
Consultabilità
Completa
Riassunto
In this work was studied the toughening of PLA (poly-lactic acid) biopolymer derived from corn with the biodegradable rubber PBAT (polybutylene adipate terephthalate).
PLA/PBAT blends with different percentage of PBAT were realized by extrusion and injection moulding. The toughening effect was evaluated by performing Charpy tests, tensile tests and three point bending test. FInally a theoretical model to evaluating the density of dissipated energy during the fracture through the plastic volume was applied and charpy specimens’ fracture surface morphology was analyzed using SEM microscopy in order to relate the mechanical properties with fracture morphology.
PLA/PBAT blends with different percentage of PBAT were realized by extrusion and injection moulding. The toughening effect was evaluated by performing Charpy tests, tensile tests and three point bending test. FInally a theoretical model to evaluating the density of dissipated energy during the fracture through the plastic volume was applied and charpy specimens’ fracture surface morphology was analyzed using SEM microscopy in order to relate the mechanical properties with fracture morphology.
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