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dc.creatorMilićević, Dejan S.
dc.creatorTrifunović, S.
dc.creatorDojčilović, Jablan R.
dc.creatorIgnjatović, Nenad
dc.creatorSuljovrujić, Edin H.
dc.date.accessioned2018-03-01T21:21:43Z
dc.date.accessioned2018-05-08T09:59:55Z
dc.date.available2018-03-01T21:21:43Z
dc.date.available2018-05-08T09:59:55Z
dc.date.issued2010
dc.identifier.issn0168-583X (print)
dc.identifier.issn1872-9584 (electronic)
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/2755
dc.description.abstractThe influence of gamma radiation on the molecular weight and glass transition behaviour of poly-L-lactide (PLLA) and hydroxyapatite/poly-L-lactide (HAp/PLLA) nanocomposite has been studied Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC) The apparent activation energy (Delta H*) for glass transition was determined on the basis of the heating rate dependence of the glass transition temperature (T-g). Our findings support the fact that chain scission is the main reason for the decrease of T-g and Delta H* with the absorbed dose Furthermore, more intensive chain scission degradation of PLLA was observed in HAp/PLLA and can only be ascribed to the presence of HAp nanoparticles. Consequently, initial differences in the glass transition temperature and/or apparent activation energy of PLLA and HAp/PLLA became more pronounced with absorbed dose. This study reveals that radiation-induced changes in molecular weight and glass transition temperature occur in a predictable and fairly accurate manner Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of these biomaterials (C) 2010 Elsevier B V. All rights reserveden
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/141013/RS//
dc.rightsrestrictedAccessen
dc.sourceNuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atomsen
dc.subjectPoly L-lactideen
dc.subjectHydroxyapatiteen
dc.subjectGamma radiationen
dc.subjectMolecular weighten
dc.subjectGlass transitionen
dc.titleThe influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocompositeen
dc.typearticleen
dcterms.abstractТрифуновић, С.; Дојчиловић, Ј.; Игњатовић, Ненад; Суљоврујић, Един Х.; Милићевић, Дејан С.;
dc.citation.spage2744
dc.citation.epage2749
dc.citation.volume268
dc.citation.issue17-18
dc.identifier.wos000281498900031
dc.identifier.doi10.1016/j.nimb.2010.06.036
dc.identifier.scopus2-s2.0-77955513055
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/handle/123456789/2755/Milicevic_Nuclear Instruments and Methods in Physics Research Section B_268_2010_2744_2749.pdf


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