Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/20853
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Pettarin, Valeria | - |
dc.contributor.author | Viau, Gastón | - |
dc.contributor.author | Fasce, L. | - |
dc.contributor.author | Viana, J. C. | - |
dc.contributor.author | Pontes, A. J. | - |
dc.contributor.author | Frontini, P. M. | - |
dc.contributor.author | Pouzada, A. S. | - |
dc.date.accessioned | 2012-11-16T11:40:43Z | - |
dc.date.available | 2012-11-16T11:40:43Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 1548-2634 | por |
dc.identifier.uri | https://hdl.handle.net/1822/20853 | - |
dc.description | Documento submetido para revisão pelos pares. A publicar em Polymer Engineering & Science. ISSN 1548-2634. | por |
dc.description.abstract | Polypopylene/nanoclay three-dimensional parts were produced without intermediate steps by direct injection molding to explore the influence of flow features and nanoclay incorporation in their impact performance. The nanocomposite was obtained by direct compounding of commercial PP with nanoclay masterbatch. The as-molded morphology was analyzed by X-ray and TEM analyses in terms of skin-core structure and nanoclay particle dispersion. The nanoclay particles induced the reduction of β-form spherulites, a known toughener. The impact behavior was assessed in tensile and biaxial modes. The PP nanocomposite molding toughness was practically unaffected by the processing melt temperature and flow rate. Conversely the nanoclay presence is influent in the impact performance. Under biaxial stress impact, the regions close to weld lines are tougher than the bulk and the fracture develops with main crack paths along the flow direction and the weld line. Cracking along the weld line results from less macromolecular interpenetration and chain entanglement, and unfavorable nanoparticle orientation. It seems that a failure mechanism which involves nanoclay delamination and multiple matrix crazing explains the toughening of PP in the directions where the nanoparticle orientation with respect to loading is adequate. | por |
dc.description.sponsorship | Covenant MINCyT (Argentina) - FCT (Portugal) between the Universities Nacional de Mar del Plata and Minho | por |
dc.description.sponsorship | CONICET and ANPCyT (Argentina) | por |
dc.language.iso | eng | por |
dc.rights | restrictedAccess | por |
dc.subject | Polypropylene | por |
dc.subject | Nanocomposites | por |
dc.subject | Injection molding | por |
dc.subject | SCORIM | por |
dc.subject | Structure-property relations | por |
dc.subject | Failure | por |
dc.subject | Impact resistance | por |
dc.subject | Nanotechnology | por |
dc.title | Uni- and biaxial impact behaviour of double-gated nanoclay-reinforced polypropylene injection mouldings | por |
dc.type | preprint | - |
dc.peerreviewed | yes | por |
sdum.publicationstatus | submitted | por |
oaire.citationTitle | Polymer Engineering & Science | por |
sdum.journal | Polymer Engineering & Science | por |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2011 Pettarin V accepted.pdf Acesso restrito! | Documento final | 4,87 MB | Adobe PDF | Ver/Abrir |