Accurate Evaluation of Dynamics and Specific Interactions in PLA/TiO2 Nanocomposites

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dc.contributor.author Segura Gonzalez, Edwin Ariel
dc.contributor.author Teno Díaz, Jorge
dc.contributor.author González Benito, Francisco Javier
dc.contributor.author Olmos Díaz, Dania
dc.date.accessioned 2021-06-23T08:28:21Z
dc.date.available 2021-06-23T08:28:21Z
dc.date.issued 2017-07-15
dc.identifier.bibliographicCitation Segura González, E. A., Teno, J., González-Benito, J. & Olmos. D. (2019). Accurate Evaluation of Dynamics and Specific Interactions in PLA/TiO2 Nanocomposites. Journal of Molecular Physics, 1(1), pp. 1-13.
dc.identifier.issn 0026-8976
dc.identifier.uri http://hdl.handle.net/10016/32914
dc.description.abstract Near infrared spectroscopy in the transmission mode was used to study the effect of the presence of TiO2 nanoparticles on the dynamics of Polylactic Acid (PLA) in PLA/TiO2 nanocomposites. The variation of IR absorbance of certain bands, the average energy of those absorptions (< ν >, cm-1) and two-dimensional Infrared (2D IR) correlation spectroscopy as a function of temperature and TiO2 content (0, 1, 5 and 10% wt) were used. Thermal transitions associated to the glass transition (64 ℃) and cold crystallization temperatures (123 ℃) are clearly identified from the analysis of integrated absorbance of bands at 4770 and 4725 cm-1, assigned to amorphous phase, as they were more sensitive to temperature changes. The band at 4440 cm-1, related with the formation of crystalline regions, showed a better definition of the thermal transitions as well as the bands at 4307 and 4255 cm-1 associated to the combination of C-H wagging modes showed sharp changes, suggesting that transitions occur due to backbone conformational changes. The evolution of integrated absorbance of different bands in PLA-TiO2 nanocomposites as a function of temperature, seem to point out the presence of specific interactions between the C = O group and TiO2 nanoparticles. This effect is observed up to 1% wt whereas for higher loadings it is not possible to detect thermal transitions due to the scattered of the data for higher loadings of particles.
dc.description.sponsorship Authors gratefully acknowledge financial support from the Ministerio de Ciencia e Innovación (project MAT2010-16815) and the Ministerio de Economia y competitividad (Project MAT2014-59116-C2-1-R) and project number 2011/00287/002.
dc.format.extent 13
dc.language.iso eng
dc.publisher Taylor & Francis
dc.rights © 2017 González EAS, et al.
dc.rights Atribución 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by/3.0/es/
dc.subject.other Polymer dynamics
dc.subject.other 2D-Infrared correlation spectroscopy
dc.subject.other Polylactic acid (PLA)
dc.subject.other Tio2 nanoparticles
dc.title Accurate Evaluation of Dynamics and Specific Interactions in PLA/TiO2 Nanocomposites
dc.type article
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi https://doi.org/10.36959/562/615
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MAT2010-16815
dc.relation.projectID Gobierno de España. MAT2014-59116-C2-1-R
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 1
dc.identifier.publicationlastpage 13
dc.identifier.publicationtitle Journal of Molecular Physics
dc.identifier.publicationvolume 1
dc.identifier.uxxi AR/0000022400
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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