NDLI: Préparation d’un composite hybride par co-malaxeur : influence des paramètres de mise en oeuvre sur les propriétés

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Préparation d’un composite hybride par co-malaxeur : influence des paramètres de mise en oeuvre sur les propriétés

Content Provider	Semantic Scholar
Author	Axel, Salinier
Copyright Year	2014
Abstract	This PhD work deals with the relationship between the processing parameters at the melt state and the polymer matrix hybrid composite material’s properties. The fillers studied are short glass fibres (micrometric scale) and carbon nanotubes (CNT) (nanometric scale) dispersed in a high temperature polymer matrix, the poly(etherimide) (PEI). We showed that glass fibres strongly participate in the CNT network structuration and that electrical conductivity of multiscale composite materials is higher than the one of nanocomposite materials. The combination of the two fillers allows obtaining a synergy effect for the mechanical properties especially for the elongation at break which is due to a preferential localization of CNT at the PEI/glass fibres interfaces. The study of the influence of processing parameters on the properties of nanocomposite materials and hybrid composite materials showed that Specific Mechanical Energy (SME) has a strong influence on the hybrid composite material properties and especially on the electrical conductivity. These variations are the consequences of CNT network modifications. Glass fibres concentration has also a strong influence on the electrical conductivity of the hybrid composite materials. It is possible to adjust the electrical conductivity with modifying the concentration of glass fibres especially for the CNT amount closed to the electrical percolation threshold.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.theses.fr/2014PAUU3047/document
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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