Foaming behavior and mechanical properties of microcellular PP/SiO2 composites / W. Gong in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 2 (05/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 2 (05/2012) . - p. 181-186 Titre : Foaming behavior and mechanical properties of microcellular PP/SiO2 composites Type de document : texte imprimé Auteurs : W. Gong, Auteur ; K. J. Liu, Auteur ; C. Zhang, Auteur ; J. H. Zhu, Auteur ; L. He, Auteur Année de publication : 2012 Article en page(s) : p. 181-186 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de silicium Matériaux hybrides Mousses plastiques -- Propriétés mécaniques Nanoparticules Polypropylène Index. décimale : 668.9 Polymères Résumé : Microcellular foamed polypropylene (PP)/SiO2composites were prepared by using micro-SiO2and nano-SiO2particles. The effects of the particle size of SiO2on the foaming behavior and mechanical properties of the composites were studied based on heterogeneous nucleation theory. The results showed that the silica facilitated the cell nucleation to some extent. The average cell size of 16.3 µm and the cell density of 4.46 × 107cells/cm3were achieved for the composite foam at the silica content of 4 wt.%. The plastic deformation of the PP was strongly constrained due to the presence of the nano-silica. The tensile and impact strength of the nano-SiO2composite foam are larger than those of the micro-SiO2composite foam due to the high crack propagation resistance in the microcellular PP/nano-SiO2composite. Note de contenu : - EXPERIMENT : Materials - Preparation of PP/SiO2 masterbatch - Preparation of microcellular PP composites - Characterisation - Mechanical measurement - RESULTS AND DISCUSSION : Cell nucleation behavior of PP/SiO2 composites - Foaming behavior of PP/SiO2 composite - Effect of specific surface area on the foaming behavior of microcellular PP/SiO2 composite - Effect of the crystallization behavior on the foaming behavior of microcellular PP/SiO2 composite - Effect of SiO2 particle size on the cell structure of microcellular PP/SiO2 composite - Effect of SiO2 particle size on the mechanical properties in microcellular PP/SiO2 composite DOI : 10.3139/217.2458 En ligne : https://drive.google.com/file/d/19IHnKv4qmPGhf7pVIZhPWqe8Ad1voSRa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14593 [article]

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