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dc.contributor.authorD'Ambrosio, Rosa M.
dc.contributor.authorMichell, Rose Mary
dc.contributor.authorMincheva, Rosica
dc.contributor.authorHernández, Rebeca
dc.contributor.authorMijangos, Carmen
dc.contributor.authorDubois, Philippe
dc.contributor.authorMüller Sánchez, Alejandro Jesús
dc.date.accessioned2019-01-09T16:13:01Z
dc.date.available2019-01-09T16:13:01Z
dc.date.issued2017-12-22
dc.identifier.citationPolymers 10(1) : (2018) // Article ID 8es_ES
dc.identifier.issn2073-4360
dc.identifier.urihttp://hdl.handle.net/10810/30702
dc.description.abstractThe crystallization and morphology of PLA-mb-PBS copolymers and their corresponding stereocomplexes were studied. The effect of flexible blocks (i.e., polybutylene succinate, PBS) on the crystallization of the copolymers and stereocomplex formation were investigated using polarized light optical microscopy (PLOM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR), and carbon-13 nuclear magnetic resonance spectroscopy (C-13-NMR). The PLA and PBS multiple blocks were miscible in the melt and in the glassy state. When the PLA-mb-PBS copolymers are cooled from the melt, the PLA component crystallizes first creating superstructures, such as spherulites or axialites, which constitute a template within which the PBS component has to crystallize when the sample is further cooled down. The Avrami theory was able to fit the overall crystallization kinetics of both semi-crystalline components, and the n values for both blocks in all the samples had a correspondence with the superstructural morphology observed by PLOM. Solution mixtures of PLLA-mb-PBS and PLDA-mb-PBS copolymers were prepared, as well as copolymer/homopolymer blends with the aim to study the stereocomplexation of PLLA and PDLA chain segments. A lower amount of stereocomplex formation was observed in copolymer mixtures as compared to neat L-100/D-100 stereocomplexes. The results show that PBS chain segments perturb the formation of stereocomplexes and this perturbation increases with the amount of PBS in the samples. However, when relatively low amounts of PBS in the copolymer blends are present, the rate of stereocomplex formation is enhanced. This effect dissappears when higher amounts of PBS are present. The stereocomplexation was confirmed by FTIR and solid state C-13-NMR analyses.es_ES
dc.description.sponsorshipThe USB team acknowledges support from DID-USB for the funding of USB Polymer Group 1 (GPUSB1-DIDG02). The two research groups from Spain acknowledge funding received through the coordinated project: "Mineco MAT2014-53437". Rosica Mincheva and Philippe Dubois gratefully acknowledge funding from Wallonia and Europe in the frame of the (FEDER) POLYTISS-POLYEST and BIOMAT projects.es_ES
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/MAT2014-53437es_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subjectpoly(lactic acid) (PLA)es_ES
dc.subjectcrystallization kineticses_ES
dc.subjectstereocomplexeses_ES
dc.subjectcrystallization in multi-block copolymerses_ES
dc.subjectpolybutylene succinate (PBS)es_ES
dc.titleCrystallization and Stereocomplexation of PLA-mb-PBS Multi-Block Copolymerses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holder© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).es_ES
dc.rights.holderAtribución 3.0 España*
dc.relation.publisherversionhttps://www.mdpi.com/2073-4360/10/1/8es_ES
dc.identifier.doi10.3390/polym10010008
dc.departamentoesCiencia y tecnología de polímeroses_ES
dc.departamentoeuPolimeroen zientzia eta teknologiaes_ES


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© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).