Investigation of the effects of formulation and processing parameters on properties of PA 6 nanocomposites using Taguchi method of experimental design / M. Moghri in INTERNATIONAL POLYMER PROCESSING, Vol. XXIII, N° 5 (11/2008)

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIII, N° 5 (11/2008) . - p. 430-438 Titre : Investigation of the effects of formulation and processing parameters on properties of PA 6 nanocomposites using Taguchi method of experimental design Type de document : texte imprimé Auteurs : M. Moghri, Auteur ; H. Garmabi, Auteur Année de publication : 2008 Article en page(s) : p. 430-438 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : In this work, the effect of processing conditions and nanoclay (NC) content on formation and various properties of polyamide 6 (PA 6) nanocomposites was studied by means of Taguchi method of experimental design. PA 6/organoclay nanocomposites were prepared by melt mixing of PA 6 at different organoclay loadings using a co-rotating twin-screw extruder. In order to investigate the effects of both processing conditions and organoclay content on silicate dispersion (exfoliation) and thermal and mechanical properties of the nanocomposites, different extrusion rates, processing temperatures and feeding rates at various NC loadings were used. X-ray diffraction (XRD) was used to characterize the formation of nanostructure and clay dispersion. The thermal properties of PA 6 nanocomposites were studied through TMA tests. XRD results revealed the formation of nanocomposite and evidenced that the samples exhibit mixed intercalated/exfoliated morphology and verified that, the extent of exfoliation increases with both clay content and extrusion rate used. The mechanical properties of PA 6 nanocomposites were studied using tensile tests. The strength and modulus of PA 6 nanocomposites were improved significantly by increasing the clay concentration and shear rate level. DOI : 10.3139/217.2132 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2613 [article]

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Study on the effects of temperature and compatibilizer on the interfacial tension of PP/PA6 and PP/PET pairs / A. Kiani in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 1 (03/2009)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 1 (03/2009) . - p. 2-8 Titre : Study on the effects of temperature and compatibilizer on the interfacial tension of PP/PA6 and PP/PET pairs Type de document : texte imprimé Auteurs : A. Kiani, Auteur ; H. Garmabi, Auteur Année de publication : 2009 Article en page(s) : p. 2-8 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Interfaces (Sciences physiques) Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polyéthylène téréphtalate Polymères -- Effets de la température Polypropylène Tension superficielle Tags : Polypropylène/Polyéthylène  téréphtalate  Polypropylène/Polyamide6  Tension  interfaciale Index. décimale : 668.9 Polymères Résumé : The interfacial tension (IFT) of Polypropylene/Polyamide6 (PP/PA6) and Polypropylene/Polyethylene terephthalate (PP/PET) pairs was evaluated as a function of temperature and Glycidyl Methacrylate grafted PP (PP-g-GMA) content, using the pendant drop method (PDM). PP-g-GMA was used as the compatibilizer in both systems. It was observed that IFT values of both systems showed a linear decrease with increasing temperature. Also, presence of a small amount of PP-g-GMA compatibilizer in the PP phase reduced the IFT of polymeric pairs dramatically, while adding more compatibilizer had no influence on IFT, due to the saturation of the interface. The saturation concentrations of GMA in the PP phase were obtained for 0.05 wt.% and 0.025 wt.% in PP/PA6 and PP/PET systems, respectively. The IFT values of compatibilized systems were reduced by 68% for PP/PA6 and 57% for PP/PET pairs compared to non-compatibilized ones. DOI : 10.3139/217.2069 En ligne : https://drive.google.com/file/d/1i2szfu6MiRvroghClQpNvJJczOT8-mIA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4201 [article]

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