dc.contributor.author | Muñoz Ugartemendia, Jone | |
dc.contributor.author | Larrañaga Espartero, Aitor | |
dc.contributor.author | Amestoy Muñoz, Hegoi | |
dc.contributor.author | Sarasua Oiz, José Ramón | |
dc.date.accessioned | 2024-10-03T15:16:34Z | |
dc.date.available | 2024-10-03T15:16:34Z | |
dc.date.issued | 2014-06-12 | |
dc.identifier.citation | Polymer Degradation and Stability 108 : 87-96 (2014) | es_ES |
dc.identifier.issn | 0141-3910 | |
dc.identifier.issn | 1873-2321 | |
dc.identifier.uri | http://hdl.handle.net/10810/69674 | |
dc.description.abstract | Phase-structural changes and enthalpic relaxation behavior of poly(d,l-lactide) (PDLLA), poly(l-lactide) (PLLA) and poly(l-lactide-co-ε-caprolactone) (PLCL) copolymers with a lactide molar content ∼70% and having different randomness character (PLCLr1: R = 0.69; PLCLr2: R = 0.92) were evaluated over 7 days in phosphate buffered saline (PBS) at 37 °C. Results obtained by Temperature Modulated Differential Scanning Calorimetry (TMDSC) and Dynamic Mechanical Analysis (DMA) showed an increase in the value of enthalpic relaxation (δ) and the narrowing of the tan δ peak, respectively, indicating the reduction in molecular mobility and a more uniform distribution of the entropic states as the aging time increased. The results obtained for PLCLs were clearly affected by chain microstructural magnitudes, lLA (PLCLr1 = 4.35 and PLCLr2 = 3.45). Both showed a crystallization process accompanied by amorphous phase separation during the early stage in PBS. DSC and DMA results also revealed faster structural changes as a result of new supramolecular arrangements as well as a higher tendency to crystallize for PLCLr1 regarding PLCLr2. | es_ES |
dc.description.sponsorship | The authors are thankful for funds of the Basque Government (GV/EJ), Department of Education, Universities and Research (GIC10/152-IT-334-10) and Dept. of Industry (IE10/276), MICINN (BIO2010-21542-C02-01), and for the pre-doctoral grant from GV/EJ for J. M. U. The authors thank also the University of the Basque Country (UPV-EHU) for a pre-doctoral grant for A.L.E and H.A.M. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/BIO2010-21542-C02-01 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | Supramolecular evolution over an initial period of biodegradation of lactide and caprolactone based medical (co) polyesters | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2014 Elsevier under CC BY-NC-ND | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.polymdegradstab.2014.06.004 | es_ES |
dc.identifier.doi | 10.1016/j.polymdegradstab.2014.06.004 | |
dc.departamentoes | Ingeniería Minera y Metalúrgica y Ciencia de los Materiales | es_ES |
dc.departamentoeu | Meatze eta metalurgia ingeniaritza materialen zientzia | es_ES |