INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
FRACTURE BEHAVIOUR OF RECYCLABLE ALL-POLYPROPYLENE
Autor/es:
ARIEL STOCCHI; IZER ANDRAS; BÁRÁNY TAMÁS; CELINA BERNAL; VALERIA PETTARIN
Revista:
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
Editorial:
SAGE PUBLICATIONS LTD
Referencias:
Año: 2010 vol. 50 p. 2106 - 2114
ISSN:
0892-7057
Resumen:
The fracture behavior of all-PP composites was studied under quasi-static loading conditions.
Fracture toughness was evaluated by means of different Fracture Mechanics approaches
depending on materials behavior. Composites consolidated at low temperature exhibited popin
features and the failure occurs typically by delamination and tape pullout. With increasing
consolidation quality i.e. with increasing processing temperature the delamination became
less pronounced before the specimens break. In composites consolidated at the highest
temperature investigated (190ºC), the laminate-like structure typical of self-reinforced
composites produced according to film-stacking method was lost. Accordingly, composites
behave as if they were only α-PP and β-PP matrixes: α−rPP exhibited typical brittle fracture
of α-PP, while β−rPP exhibited the stable behavior with fully yielded ligament before crack
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
of α-PP, while β−rPP exhibited the stable behavior with fully yielded ligament before crack
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
α-PP and β-PP matrixes: α−rPP exhibited typical brittle fracture
of α-PP, while β−rPP exhibited the stable behavior with fully yielded ligament before crack
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
α-PP, while β−rPP exhibited the stable behavior with fully yielded ligament before crack
propagation commonly observed for β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.
β-PP. In general, stress-strain behavior changed from
stable to unstable and fracture toughness strongly decreased as consolidation quality
increased. Based on these results and previous findings, it can be concluded that the properties
of self-reinforced PP composites can be tailored for a given application through the quality of
consolidation.