Mostrar el registro sencillo del ítem

dc.contributor.author
Loiola, Livia M. D.  
dc.contributor.author
Fasce, Laura Alejandra  
dc.contributor.author
Da Silva, Laura C. E.  
dc.contributor.author
Goncalves, Maria C.  
dc.contributor.author
Frontini, Patricia Maria  
dc.contributor.author
Felisberti, Maria I.  
dc.date.available
2018-01-24T21:14:15Z  
dc.date.issued
2016-08-16  
dc.identifier.citation
Loiola, Livia M. D.; Fasce, Laura Alejandra; Da Silva, Laura C. E.; Goncalves, Maria C.; Frontini, Patricia Maria; et al.; Thermal and mechanical properties of nanocomposites based on a PLLA-b-PEO-b-PLLA triblock copolymer and nanohydroxyapatite; Wiley; Journal of Applied Polymer Science; 133; 44; 16-8-2016; 44187  
dc.identifier.issn
0021-8995  
dc.identifier.uri
http://hdl.handle.net/11336/34532  
dc.description.abstract
Composites which combine biocompatible polymers and hydroxyapatite are unique materials with regards to their mechanical properties and bioactivity in the development of temporary bone-fixation devices. Nanocomposites based on a biocompatible and amphiphilic triblock copolymer of poly(L-lactide) (PLLA) and poly(ethylene oxide) (PEO) —PLLA-b-PEO-b-PLLA— and neat (nHAp) or PEO-modified (nHAp@PEO) hydroxyapatite nanoparticles were prepared by dispersion in benzene solutions, followed by freeze-drying and injection moulding processes. The morphology of the copolymers of a PEO block dispersed throughout a PLLA matrix was not changed with addition of the nanofillers. The nHAp particles were spherical and, after modification, the nHAp@PEO nanoparticles were partially agglomerated. In the nanocomposites, these particles characteristics remained unchanged, and the nHAp particles and nHAp@PEO agglomerates were uniformly dispersed through the copolymer matrix. These particles acted as nucleating agents, with nHAp@PEO being more efficient. The incorporation of nHAp increased both the reduced elastic modulus (22%) and the indentation hardness (15%) in comparison to the copolymer matrix, as determined by nanoindentation tests, while nHAp@PEO addition resulted in lower increments of these mechanical parameters. The incorporation of untreated nHAp was, therefore, more beneficial with regards to the mechanical properties, since the amphiphilic PLLA-b-PEO-b-PLLA matrix was already efficient for nHAp nanoparticles dispersion.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Wiley  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Mechanical Properties  
dc.subject
Morphology  
dc.subject
Nanocomposites  
dc.subject
Thermal Properties  
dc.subject
Triblock Copolymer  
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.subject.classification
Nano-procesamiento  
dc.subject.classification
Nanotecnología  
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Thermal and mechanical properties of nanocomposites based on a PLLA-b-PEO-b-PLLA triblock copolymer and nanohydroxyapatite  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-01-18T14:16:00Z  
dc.journal.volume
133  
dc.journal.number
44  
dc.journal.pagination
44187  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Hoboken  
dc.description.fil
Fil: Loiola, Livia M. D.. Universidade Estadual de Campinas; Brasil  
dc.description.fil
Fil: Fasce, Laura Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina  
dc.description.fil
Fil: Da Silva, Laura C. E.. Universidade Estadual de Campinas; Brasil  
dc.description.fil
Fil: Goncalves, Maria C.. Universidade Estadual de Campinas; Brasil  
dc.description.fil
Fil: Frontini, Patricia Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina  
dc.description.fil
Fil: Felisberti, Maria I.. Universidade Estadual de Campinas; Brasil  
dc.journal.title
Journal of Applied Polymer Science  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/APP.44187  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/app.44187/abstract