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dc.contributor.author
Hermida, Elida Beatriz
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dc.contributor.author
Casariego, Vanesa
dc.date.available
2024-08-14T13:11:21Z
dc.date.issued
2009-01
dc.identifier.citation
Hermida, Elida Beatriz; Casariego, Vanesa; Morphology of plastic deformation and fracture of a biodegradable biopolymer; Wiley; Microscopy and Analysis; 23; 1-2009; 5-8
dc.identifier.issn
0958-1952
dc.identifier.uri
http://hdl.handle.net/11336/242503
dc.description.abstract
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is becoming a hope for the development of sustainable products because it is produced from renewable resources, is completely biodegradable and can be molded as a petrochemical thermoplastic. The mechanical behavior and biodegradability of this semi-crystalline material strongly depends on its morphology. Particularly, in this paper we show how the amorphous matrix and the spherulites of PHBV behave under tension until failure. To achieve this goal, we prepared an acid etching agent to reveal details in the spherulitic structure of compressed molded sheets. Micro-tensile tests, performed with a home-made mini-testing machine set on the stage on an inverted polarized optical microscope, allow to follow morphological changes while loading and to determine the different crack propagation mechanisms. Crazing and shear bands are the strain mechanisms operating within the amorphous matrix of PHBV. In the closely packed spherulitic morphology, crack propagation may be: along the circumferential planes of the spherulites, trans-spherulitic along radial or circumferential planes or through the sharp boundaries between adjacent spherulites.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Polarized light microscopy
dc.subject
Morphology
dc.subject
Strain mechanisms
dc.subject
Fracture
dc.subject
Biopolymer
dc.subject.classification
Otras Ingeniería de los Materiales
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Morphology of plastic deformation and fracture of a biodegradable biopolymer
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-13T12:32:23Z
dc.journal.volume
23
dc.journal.pagination
5-8
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Nueva Jersey
dc.description.fil
Fil: Hermida, Elida Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Comisión Nacional de Energía Atómica; Argentina
dc.description.fil
Fil: Casariego, Vanesa. Universidad Nacional de San Martín. Instituto Sabato; Argentina
dc.journal.title
Microscopy and Analysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://analyticalscience.wiley.com/content/article-do/morphology-plastic-deformation-and-fracture-biodegradable-biopolymer
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