Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure

8 pags., 14 figs., 3 tabs.

Detalles Bibliográficos
Autores: Ania, F., Baltá Calleja, Francisco José, Bayer, R. K., Tshmel, A., Naumann, I., Michler, G.H.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:1996
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/226171
Acceso en línea:http://hdl.handle.net/10261/226171
Access Level:acceso abierto
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spelling Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structureAnia, F.Baltá Calleja, Francisco JoséBayer, R. K.Tshmel, A.Naumann, I.Michler, G.H.8 pags., 14 figs., 3 tabs.This study contains a combined application of three different techniques for the study of injection moulded polyethylene (PE), showing an oriented shish-kebab structure: small angle X-ray scattering (SAXS), low frequency Raman spectroscopy (LAM) and transmission electron microscopy (TEM), A series of linear PEs and molecular weights in the range 51 000-478 000 has been investigated and two injection temperatures have been used (Tm = 144 and 210°C). SAXS patterns from the highly oriented regions show the presence of either one axial long period (L1) or two (L1 and L2) depending on molecular weight (M̄w) and Tm. It is shown that L1 and L2 increase with M̄w up to a given critical molecular weight M̄c. Above M̄c, L1 and L2 remain constant. Raman results qualitatively confirm the existence of two separate distributions of straight-length chain segments for those samples having molecular weights above the critical value. Shorter segments are shown to be more abundant than the longer ones. In the lowest molecular weight sample, results from SAXS, TEM and Raman spectroscopy seem to be consistent with each other, although in some cases a tilted molecular arrangement within the lamellae has to be invoked. On the other hand, in case of the highest molecular weight sample, the length of the short straight-chain segments derived from Raman spectroscopy agrees well with the double periodicity obtained from SAXS. On the contrary, long periods measured from TEM only correspond to the shorter SAXS periodicity. This result is discussed by assuming the occurrence of crystalline bridges among adjacent lamellae. © 1996 Chapman & Hall.Grateful acknowledgements is due to DIGICYT, Spain (Grant PB94-0049) and DAAD, Germany and DIGICYT (Grant HA94-193B) for the support of this investigation.Chapman and HallDirección General de Investigación Científica y Técnica, DGICT (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202119962021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_dcae04bcPostprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/226171reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1007/BF00356439Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2261712026-05-22T06:33:51Z
dc.title.none.fl_str_mv Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
title Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
spellingShingle Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
Ania, F.
title_short Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
title_full Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
title_fullStr Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
title_full_unstemmed Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
title_sort Comparative study of size and distribution of lamellar thicknesses and long periods in polyethylene with a shish-kebab structure
dc.creator.none.fl_str_mv Ania, F.
Baltá Calleja, Francisco José
Bayer, R. K.
Tshmel, A.
Naumann, I.
Michler, G.H.
author Ania, F.
author_facet Ania, F.
Baltá Calleja, Francisco José
Bayer, R. K.
Tshmel, A.
Naumann, I.
Michler, G.H.
author_role author
author2 Baltá Calleja, Francisco José
Bayer, R. K.
Tshmel, A.
Naumann, I.
Michler, G.H.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Dirección General de Investigación Científica y Técnica, DGICT (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description 8 pags., 14 figs., 3 tabs.
publishDate 1996
dc.date.none.fl_str_mv 1996
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_dcae04bc
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/226171
url http://hdl.handle.net/10261/226171
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1007/BF00356439
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Chapman and Hall
publisher.none.fl_str_mv Chapman and Hall
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
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score 15,811543

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