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Morphology in multilayer blown films of polypropylene and ethylene-octene copolymer blends / J. Silva in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 3 (07/2018)

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inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 345-354

Titre :	Morphology in multilayer blown films of polypropylene and ethylene-octene copolymer blends
Type de document :	texte imprimé
Auteurs :	J. Silva, Auteur ; M. Elias, Auteur ; N. Lima ; Sebastiao Canevarolo
Année de publication :	2018
Article en page(s) :	p. 345-354
Note générale :	Bibliogr.
Langues :	Anglais (eng)
Catégories :	Analyse thermique Copolymère éthylène-octène Films plastiques Films plastiques -- Propriétés mécaniques Matières plastiques -- Soufflage Microstructures Morphologie (matériaux) Polypropylène Structures multicouches
Index. décimale :	668.4 Plastiques, vinyles
Résumé :	In this work the microstructure of multilayer blown films consisting of a core layer placed between two external ones is studied. The core layer is a blend with 70 ° (w/w) of a homopolypropylene PP and 30 ° of a metallocene-catalyzed ethylene-octene copolymer mEOC (LLDPE or VLDPE), whereas the external symmetrical layers are composed of LLDPE or they have the same composition as the core layer. The PP and PE crystalline phases formed during the film blowing were investigated by thermal analysis, mechanical properties, TEM morphology and X-ray diffraction pole figures. These films successfully combine the high mechanical strength of PP with the quasi-isotropic behavior of blown PE. Multilayer film containing PP/mEOC blends, particularly blends of PP70/LLDPE30, show better balanced tensile properties when compared at crossed directions. The presence of VLDPE in the blends shifts downwards the melting and crystallization temperatures and crystallinity of PP. X-Ray pole figures suggest the occurrence of epitaxial crystallization of the PE phase upon the PP crystals in these PP/mEOC blend films.
Note de contenu :	- EXPERIMENTAL : Materials - Blown film preparation - Films characterization - RESULTS AND DISCUSSION : Thermal analyses - Morphology - Mechanical behavior and crystallographic texture
DOI :	10.3139/217.3526
En ligne :	https://www.degruyter.com/document/doi/10.3139/217.3526/pdf
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30803

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