Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/20748

TitleShear controlled orientation in injection moulding of starch based blends intended for medical applications
Author(s)Altpeter, H.
Bevis, M. J.
Gomes, Manuela E.
Cunha, A. M.
Reis, R. L.
Issue date2003
PublisherInstitute of Materials, Minerals and Mining
JournalPlastics Rubber and composites
Abstract(s)Biodegradable polymeric implants are considered to be good alternatives to metallic implants in several temporary applications. Aliphatic polyesters have been extensively investigated and have been employed in several biomedical applications. More recently, biodegradable starch based polymeric blends have also been considered as alternative materials. In this study, the effect of shear controlled orientation injection moulding (SCORIM) on the mechanical properties and degradation behaviour of starch-polylactide and starch-poly(ethylene-co-vinyl alcohol) blends has been investigated and compared with those produced by conventional injection moulding. The changes in these properties has also been studied when using an hydroxyapatite filler to reinforce the polymeric matrixes. The SCORIM processing enhanced the unidirectional mechanical properties substantially. The incorporation of hydroxyapatite into the polymer matrix had a stiffening effect but also reduced the strength and toughness. Generally, the mechanical properties deteriorated substantially in vitro. Reinforcement by hydroxyapatite was found to be less effective than expected in a wet environment.
TypeArticle
URIhttp://hdl.handle.net/1822/20748
DOI10.1179/146580103225001372
ISSN1465-8011
Peer-Reviewedyes
AccessOpen access
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals

Files in This Item:
File Description SizeFormat 
file.pdf1,18 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID