Brosse, Anne-Carine (2009) Dispersion des nanotubes de carbone à l'aide de copolymères triblocs dans des matrices en polyamide : relation morphologie-propriétés électriques. PhD thesis Chimie et Physico-chimie des polymères, Matière Molle et Chimie, ESPCI p.242.
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Abstract
Carbon nanotubes are an optimal load because of their high aspect ratio to enable conductivity with a low percolation level in polymer matrix. We were concerned to optimize the CNTs dispersion in polyamide-6 matrix by optical observations, the shear mixing being important parameters. The growth of PA-6 trans-crystalline lamellae from the surface of the CNTs is observed. The conductivity study shows its increase with a post thermal treatment because of the CNTs aggregation. The conductivity increases when the treatment temperature increase or when the mass of the matrix decrease. Masterbatch of SBM/CNTs were prepared by melting and solution method and diluted in PA-6. The state of dispersion and the conductivity were improved with the triblock copolymers SBM because of the specific localisation of the CNTs in the composite. They are located in the SBM particles for the melting procedure and in the PA-6 for the solution procedure. The specific localisation of the CNTs in the composite is important to improve the percolation level.
| Item Type: | PhD Thesis (PhD) |
|---|---|
| PhD Supervisor: | Leibler, Ludwik |
| Date: | February 2009 |
| Board of examiners: | Gerard, Jean-Francois and Abetz, Volker and Leibler, Ludwik and Fradet, Alain and M.Piccione, Patrick and Tencé-Girault, Sylvie |
| Ecole Doctorale: | ED 397 PHYSIQUE ET CHIMIE DES MATERIAUX |
| Discipline: | Chimie et Physico-chimie des polymères |
| Collection (Fonds): | ESPCI ParisTech |
| Institution: | ESPCI |
| Department: | Matière Molle et Chimie |
| Subjects: | 4. Materials Science, Mechanics and Mechanical Engineering |
| Uncontrolled Keywords: | Composite, Nanotube de carbone, Copolymère à bloc, Polyamide, Conductivité, Cristallinité, Carbon nanotube, Cristallinity |
| ID Code: | 4915 |
| Deposited By: | Anne-Carine Brosse |
| Deposited On: | 29 May 2009 |
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