A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods

6 pags., 9 figs., 2 tabs.

Detalles Bibliográficos
Autores: Rueda, Daniel R., Ania, F., Baltá Calleja, Francisco José
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:1997
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::8cd9ec9a611f26c17206d5dc46db2d01
Acceso en línea:http://hdl.handle.net/10261/223985
Access Level:acceso abierto
Palabra clave:Polyethylene
Shish-kebab fibrils
USAXS
id ES_bf20f8eccece052ba25223c3bc2ee229
oai_identifier_str oai:dnet:digitalcsic_::8cd9ec9a611f26c17206d5dc46db2d01
network_acronym_str ES
network_name_str España
repository_id_str
spelling A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periodsRueda, Daniel R.Ania, F.Baltá Calleja, Francisco JoséPolyethyleneShish-kebab fibrilsUSAXS6 pags., 9 figs., 2 tabs.The changes in the two axial long periods of injection moulded oriented linear polyethylene (PE) with a shish-kebab structure have been investigated as a function of temperature by ultra-small angle X-ray scattering (USAXS) using synchrotron radiation. The aim of the present study is to investigate the origin of both periodicities and to establish whether both scattering maxima are mutually related. The gradual transformation of the initial two long periods, L1 = 36.4 and L2 = 65.7 nm, measured at room temperature to the final single long period Lf = 120 nm at T = 130°C has been demonstrated on high molecular weight oriented PE samples. The detection of such high long periods (up to 150 nm for these samples) has been possible, for the first time, thanks to the use of the new high resolution USAXS beam line at the DORIS-bypass, DESY. On the other hand, low molecular weight PE shows, at room temperature, one long period corresponding to an oriented structure with a wide lamellar distribution. The coherently diffracting domains in the chain direction and the mean orientation of the lamellae derived from the azimuthal scanning of the SAXS profiles have also been examined as a function of temperature. The changes of the long period L1 with temperature are shown to be independent from the changes of the L2 periodicity. From the results it is concluded that the oriented shish-kebab structure, in the high molecular weight samples, consists of two separate populations of lamellar stacks with the layer normals parallel to the injection direction. During annealing only the thinner lamellae increase in thickness until they reach the size of the thicker ones at about T = 130°C. For higher temperatures than T = 137°C the scattering maxima vanish suggesting that the lamellae melt. Finally, after cooling from the melt the lamellae crystallize epitaxially on the preserved oriented shish fibrils and both stacking periodicities L1 and L2 appear again.The work was generously supported by CICYT, Spain (Grant PB94-0049). USAXS measurements at the DORIS-bypass, DESY, Hamburg, have been funded by the program Human Capital and Mobility, Access to Large Installations EC.Peer reviewedElsevierComisión Interministerial de Ciencia y Tecnología, CICYT (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020201997info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/223985reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/S0032-3861(96)00760-4Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::8cd9ec9a611f26c17206d5dc46db2d012026-05-22T06:33:51Z
dc.title.none.fl_str_mv A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
title A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
spellingShingle A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
Rueda, Daniel R.
Polyethylene
Shish-kebab fibrils
USAXS
title_short A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
title_full A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
title_fullStr A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
title_full_unstemmed A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
title_sort A USAXS study of melt processed PE with a shish-kebab structure: the influence of temperature on the long periods
dc.creator.none.fl_str_mv Rueda, Daniel R.
Ania, F.
Baltá Calleja, Francisco José
author Rueda, Daniel R.
author_facet Rueda, Daniel R.
Ania, F.
Baltá Calleja, Francisco José
author_role author
author2 Ania, F.
Baltá Calleja, Francisco José
author2_role author
author
dc.contributor.none.fl_str_mv Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Polyethylene
Shish-kebab fibrils
USAXS
topic Polyethylene
Shish-kebab fibrils
USAXS
description 6 pags., 9 figs., 2 tabs.
publishDate 1997
dc.date.none.fl_str_mv 1997
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/223985
url http://hdl.handle.net/10261/223985
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/S0032-3861(96)00760-4
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869418343852670976
score 15,811543

Similares en LA Referencia