Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/46366
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Nanostructure and crystallization phenomena in multilayered films of alternating iPP and PA6 semicrystalline polymers |
Autor: | Ania, F. CSIC ORCID; Baltá Calleja, Francisco José CSIC ORCID; Flores, Araceli CSIC ORCID; Michler, G.H.; Scholtyssek, S.; Khariwala, D.; Hiltner, A.; Baer, E.; Rong, L.; Hsiao, Benjamin S. | Palabras clave: | Nanostructure Multilayer Crystallization Orientation PP PA6 |
Fecha de publicación: | 15-oct-2011 | Editor: | Elsevier | Citación: | European Polymer Journal, 48 (1) : 86–96 (2012) | Resumen: | The present work is concerned with the study of the crystalline morphology and the nanostructure of a multilayered system of two alternating immiscible semicrystalline polymers: isotactic polypropylene (iPP) and polyamide 6 (PA6). Films with a volume ratio of 70/30 were prepared by means of layer multiplying coextrusion. Contrary to previous experiments, performed with semicrystalline/amorphous and amorphous/amorphous nanolayered
systems, the studied iPP/PA6 film does not exhibit a well defined maximum in the
USAXS patterns. This result accounts for an irregular layered structure, as further confirmed by means of TEM images. Nevertheless, such a layered assembly still influences the crystallization behaviour of both constituent polymers. On the one hand, the crystallization of PA6 within the multilayered material is substantially hindered as evidenced by its weak scattering intensity. Real time studies as a function of temperature undoubtedly detect the presence of a WAXS peak and a SAXS maximum associated to PA6 above the melting temperature of iPP. Room temperature AFM studies also confirm the occurrence of crystalline structures within the PA6 layers. On the other hand, SAXS and WAXS measurements at room temperature reveal the occurrence of an oriented lamellar morphology within the iPP layers bearing uniaxial symmetry around an axis perpendicular to the layers surface. Results show that the crystalline molecular chains are placed mainly parallel to the layer surfaces forming edge-on lamellae. Moreover, X-ray scattering results are in agreement with the occurrence of two populations of lamellae, both edge-on and perpendicular to each other, in agreement with the crosshatched morphology observed by AFM. |
Descripción: | 11 pags. ; 11 figs. ; 1 tab. | Versión del editor: | http://dx.doi.org/10.1016/j.eurpolymj.2011.10.003 | URI: | http://hdl.handle.net/10261/46366 | DOI: | 10.1016/j.eurpolymj.2011.10.003 | ISSN: | 0014-3057 | E-ISSN: | 1873-1945 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
AniaF.pdf | 4,08 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
19
checked on 10-abr-2024
WEB OF SCIENCETM
Citations
17
checked on 28-feb-2024
Page view(s)
277
checked on 18-abr-2024
Download(s)
297
checked on 18-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.