Rheology of carbon nanotubes – filled poly(vinylidene fluoride) composites / Defeng Wu in Industrial & engineering chemistry research, Vol. 51 N° 19 (Mai 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6705–6713 Titre : Rheology of carbon nanotubes – filled poly(vinylidene fluoride) composites Type de document : texte imprimé Auteurs : Defeng Wu, Auteur ; Jianghong Wang, Auteur ; Ming Zhang, Auteur Année de publication : 2012 Article en page(s) : pp. 6705–6713 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Rheology Carbon nanotubes Résumé : The carbon nanotubes (CNTs)–filled poly(vinylidene fluoride) (PVDF) composites (PCTs) were prepared by melt compounding for rheological study. The steady and oscillatory flow behaviors were then explored. The results show that the presence of CNTs enhances the pseudoplastic flow accompanied by the increased flow activation energy. However, the linear flow region is not sensitive to the temperature whether driven by shear rate or by strain. During oscillatory shear flow, the solid-like response is attributed to the percolation of CNTs, but the formation of a percolated CNT network is temperature-dependent, and the percolation threshold values reduce with an increase of temperature. The two-phase viscoelastic model was then used to further describe the linear responses of composites, aiming at relating hierarchical structures of the CNTs to flow behaviors of the composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2024454 [article] Rheology of carbon nanotubes – filled poly(vinylidene fluoride) composites [texte imprimé] / Defeng Wu, Auteur ; Jianghong Wang, Auteur ; Ming Zhang, Auteur . - 2012 . - pp. 6705–6713. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6705–6713 Mots-clés : Rheology Carbon nanotubes Résumé : The carbon nanotubes (CNTs)–filled poly(vinylidene fluoride) (PVDF) composites (PCTs) were prepared by melt compounding for rheological study. The steady and oscillatory flow behaviors were then explored. The results show that the presence of CNTs enhances the pseudoplastic flow accompanied by the increased flow activation energy. However, the linear flow region is not sensitive to the temperature whether driven by shear rate or by strain. During oscillatory shear flow, the solid-like response is attributed to the percolation of CNTs, but the formation of a percolated CNT network is temperature-dependent, and the percolation threshold values reduce with an increase of temperature. The two-phase viscoelastic model was then used to further describe the linear responses of composites, aiming at relating hierarchical structures of the CNTs to flow behaviors of the composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2024454

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