Studies on NBR-ZDMA-OMMT nanocomposites prepared by reactive mixing intercalation method / L. Liu in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 4 (12/2004)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XIX, N° 4 (12/2004) . - p. 374-379 Titre : Studies on NBR-ZDMA-OMMT nanocomposites prepared by reactive mixing intercalation method Type de document : texte imprimé Auteurs : L. Liu, Auteur ; Y. Luo, Auteur ; D. Jia, Auteur ; B. Guo, Auteur Année de publication : 2004 Article en page(s) : p. 374-379 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : Two kinds of nanocomposites of nitrile-butadiene rubber (NBR), zinc methacrylate (ZDMA) and organomontmorillonite (OMMT), NBR-ZDMA-HMMTand NBR-ZDMA-USMMT, were prepared by the reactive mixing intercalation method with ZDMA and two kinds of organomontmorillonite, hexadecyltrimethylammonium bromide modified montmorillonite (HMMT) and unsaturated chemical modified montmorillonite (USMMT). The structure and properties of the nanocomposites were investigated by X-ray diffraction, transmission electron microscopy, differential scanning calorimetry and determination of crosslinking density and mechanical properties. The results showed that the interlayer galleries of HMMT and USMMT were enlarged as ZDMA polymerized in situ in rubber matrix and between the interlayer of the silicates. The layered silicates were dispersed disorderly in rubber matrix at a nanometer level. The crosslinking density of the NBR vulcanizates was increased by the addition of ZDMA and HMMT or USMMT. The glass transition temperatures of the NBRZDMA- OMMT nanocomposites were higher than that of the neat NBR. The mechanical properties of the NBR-ZDMA-HMMT and NBR-ZDMA-USMMT nanocomposites are remarkably superior to those of the neat NBR vulcanizate. DOI : 10.3139/217.1851 En ligne : https://drive.google.com/file/d/1po9O5ZyPmbbb5S-yG8CVGbBsFCtg5NqD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3270 [article]

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The processing behavior of liquid Sn/molten polyethylene during internal mixing / G. Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 2 (05/2014) . - p. 175-183 Titre : The processing behavior of liquid Sn/molten polyethylene during internal mixing Type de document : texte imprimé Auteurs : G. Zhang, Auteur ; T. Liu, Auteur ; X. Liu, Auteur ; Y. Yi, Auteur ; L. Liu, Auteur ; X. Tan, Auteur ; J. Luo, Auteur ; J. He, Auteur ; H. Ma, Auteur ; A. Lu, Auteur ; Z. Deng, Auteur ; Y. Shu, Auteur Année de publication : 2014 Article en page(s) : p. 175-183 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites Etain Etat fondu (matériaux) Interfaces (Sciences physiques) Mélange Polyéthylène haute densité Taille des particules Index. décimale : 668.9 Polymères Résumé : In our study, liquid tin (Sn) was mixed with molten polyethylene using an internal mixer; the interfacial tension between the liquid Sn and molten polyethylene was measured using the deformed drop retraction method. The results showed that liquid Sn separated when the Sn content was higher than approximately 2?% by volume because of the interfacial tension of up to 167?mN/m and the 106-fold viscosity difference between the liquid Sn and the molten polyethylene. When Sn separation did not occur, the effects of the mixing time and rotary speed on the degree of mixing and the Sn particle size were analyzed using thermogravimetric analysis and scanning electron microscopy. The results showed that the effects of mixing time and rotary speed on the degree of mixing and Sn particle size can be combined as the impact of specific energy input. With increasing specific energy input, the degree of mixing initially increased and subsequently remained constant, while the Sn particle size initially decreased and subsequently remained constant. The refinement of the dispersed phase was completed with a low specific energy input, but the homogenization of the dispersed phase required a higher specific energy input to achieve completion, revealing the relationship between distributive mixing and dispersive mixing. Note de contenu : - EXPERIMENTS : Raw materials - Internal mixing of Sn and HDPE - Determination of the interfacial between liquid Sn and molten HDPE - Evaluation of the homogeneity of the composites - Morphologies and sizes of the metal phase in the composites - RESULTS AND DISCUSSION : Aggregation and separation of liquid Sn - Relationship of the degree of mixing and Sn particle size with processing conditions DOI : 10.3139/217.2635 En ligne : https://drive.google.com/file/d/1-PqBCAezE0A2WzEL0_iHa1HCJ8s1wO2q/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21309 [article]

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