Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/34490
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | TGA/FTIR studies of segmented aliphatic polyurethanes and their nanocomposites prepared with commercial montmorillonites |
Autor: | Cervantes-Uc, J. M.; Moo Espinosa, J. I.; Cauich-Rodríguez, Juan V.; Ávila-Ortega, A.; Vázquez-Torres, H.; Marcos-Fernández, Ángel CSIC ORCID ; San Román, Julio CSIC | Palabras clave: | Thermal degradation TGA/FTIR Polyurethane/montmorillonite nanocomposites Thermal decomposition Segmented polyurethanes/Closites composites |
Fecha de publicación: | oct-2009 | Editor: | Elsevier | Citación: | Polymer Degradation and Stability 94(10): 1666-1677 (2009) | Resumen: | Nanocomposites prepared with segmented polyurethane (SPU) and commercially available nanoclays (Cloisite™ Na+, Cloisite™ 15A, Cloisite™ 30B) were studied using thermogravimetric analysis coupled with Fourier Transform Infrared Spectroscopy (TGA/FTIR). The results showed that the thermal degradation of unfilled SPU and the 4, 6 and 10 wt% hand mixed nanocomposites occurred in two stages being the first due to degradation of hard segments and the second due to the degradation of soft segments. It was also found that the thermal stability of these nanocomposites was not improved by increasing nanoclay concentration except for SPU/Cloisite™ 15A nanocomposites were a 40 °C increase was observed. In a similar manner, FTIR spectra of the evolved gases obtained after the thermal degradation of these nanocomposites were qualitatively similar to the unfilled polymer except in those containing Cloisite™ 30B where isocyanate absorptions were detected. In contrast, SPU/Cloisite™ 30B nanocomposites prepared by in-situ polymerization, exhibited higher thermal stability than the corresponding hand mixed nanocomposites. In addition, these nanocomposites exhibited the presence of carbon dioxide in the evolved gases during its second degradation stage which was not observed in the hand mixed nanocomposites. In this case, it can be said that the presence of clays in the nanocomposites has a significant effect on the thermal degradation pathways. | Descripción: | 12 páginas, 14 figuras, 2 esquemas, 1 tabla. | Versión del editor: | http://dx.doi.org/10.1016/j.polymdegradstab.2009.06.022 | URI: | http://hdl.handle.net/10261/34490 | DOI: | 10.1016/j.polymdegradstab.2009.06.022 | ISSN: | 0141-3910 |
Aparece en las colecciones: | (ICTP) Artículos |
Mostrar el registro completo
CORE Recommender
SCOPUSTM
Citations
157
checked on 22-abr-2024
WEB OF SCIENCETM
Citations
140
checked on 25-feb-2024
Page view(s)
460
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.