Elastomer nanocomposites based on NR/EPDM/organoclay : morphology and properties / A. Alipour in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 1 (03/2011)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 1 (03/2011) . - p. 48-55 Titre : Elastomer nanocomposites based on NR/EPDM/organoclay : morphology and properties Type de document : texte imprimé Auteurs : A. Alipour, Auteur ; Ghasem Naderi, Auteur ; G. R. Bakhshandeh, Auteur ; H. Vali, Auteur ; S. Shokoohi, Auteur Année de publication : 2011 Article en page(s) : p. 48-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères -- propriétés mécaniques Caoutchouc Diffractométrie de rayons X Ethylène-propylène-diène monomère Matériaux hybrides Microscopie électronique en transmission Montmorillonite Nanoparticules Rhéologie Silicates Index. décimale : 668.9 Polymères Résumé : Natural rubber/Ethylene Propylene Diene Monomer (NR/EPDM) blends of five different compositions (0/100), (25/75), (50/50), (75/25) and (100/0) with 1, 3, 5 and 7 phr organo-modified nanoclay (Cloisite 15A) were prepared by two-roll mill. The effect of organo-modified layered nanosilicates and composition on the cure characteristics, microstructure, mechanical, and rheological properties of the nanocomposites were studied. Results suggested the intercalation of polymer chains into the silicate layers which was evidenced by d-spacing results of X-ray diffraction patterns. TEM micrographs also directly confirmed XRD results. Mechanical properties of the nanocomposites depicted a nearly 40% percents increase respectively in the tensile modulus of 75NR/25EPDM containing 7 wt.% nanoclay. DOI : 10.3139/217.2381 En ligne : https://drive.google.com/file/d/1XwfY-AUYicC6qKRMSjM60AEWtDdMlj8u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11037 [article]

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Microstructural evolution of PP/EPDM/organoclay nanocomposites in a twin screw extruder / R. Khosrokhavar in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 2 (05/2011) . - p. 212-218 Titre : Microstructural evolution of PP/EPDM/organoclay nanocomposites in a twin screw extruder Type de document : texte imprimé Auteurs : R. Khosrokhavar, Auteur ; Ghasem Naderi, Auteur ; G. R. Bakhshandeh, Auteur ; M. H. R. Ghoreishy, Auteur Année de publication : 2011 Article en page(s) : p. 212-218 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile Cloisite Diffractométrie de rayons X Ethylène-propylène-diène monomère Extrudeuse bi-vis Matériaux hybrides Microscopie électronique en transmission Polypropylène Rhéologie Index. décimale : 668.9 Polymères Résumé : The offline Microstructure of nanocomposites based on Poly-Propylene (PP), Ethylene-Propylene Diene Monomer (EPDM) and Cloisite 15A along the twin screw extruder barrel was investigated by X-Ray diffraction, Transmission Electron Microscopy (TEM) and rheological measurements. To assess the effect of screw zones, the microstructural development of nanocomposites along the screw was investigated. Accordingly, dead-stop experiment samples were taken at four different positions of the extruder after abruptly stopping the machine and opening the barrel. Effect of clay loading on the evolution of morphology in the extruder was studied. X-Ray diffraction results showed that at lower clay contents (up to~ 7 wt.%), the intercalation process is independent of screw geometry and accomplishes as soon as the matrix is melted; and on the other hand, excessive melt mixing of the samples containing higher clay loadings (10 wt.%) might lead to the collapse of silicate layers and consequently poor degrees of intercalation/exfoliation. Results were confirmed by TEM micrographs and also XRD patterns of the nanocomposites sensitively detecting the microstructural changes of the samples. DOI : 10.3139/217.2445 En ligne : https://drive.google.com/file/d/1hk4uZSKHI-M41ZOWEmk16v1JCxi6lpmR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11525 [article]

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