| Titre : |
Effect of nano-particles on flow and recovery of polymer nano-composites in the melt state |
| Type de document : |
texte imprimé |
| Auteurs : |
H. M. Hassanabadi ; Denis Rodrigue |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 151-158 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Argile
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Composites
Copolymère éthylène acétate de vinyle
Etat fondu (matériaux)
Matériaux hybrides
Montmorillonite
Rhéologie
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
The effect of nano-particle geometry on flow and recovery of polymer melts based on ethylene vinyl acetate (EVA) was investigated. Two nano-particles, calcium carbonate (CaCO3) and montmorillonite clay, were used with concentrations between 2.5 and 15 % by weight. First, by using small amplitude oscillatory shear and transient step shear tests, the linear and non-linear response of the nano-composites was studied. Then, to examine the structure recovery, the same behavior was studied on pre-sheared samples. The linear and non-linear data revealed that the effect of nano-particles in material flow is more important for anisometric particles which can be attributed to their ability to form a fractal structure controlling the rheological properties while spherical particles are not able to form such networks. Recovery experiments revealed that while nano-composites containing spherical particles have relatively similar response in subsequent tests, the rheological properties decreased significantly for platelet particles. The recovery results were also interpreted based on a filler-network mechanism and the reduction of the nano effect for anisometric particles was related to the breakdown of the filler network. These observations were validated by morphological investigations. |
| Note de contenu : |
- EXPERIMENTS : Materials and samples preparation - Morphological characterization - Rheological analysis
- RESULTS AND DISCUSSION : Morphological characterization - Dynamic data - Shear transient response - Recovery properties under flow |
| DOI : |
10.3139/217.2631 |
| En ligne : |
https://drive.google.com/file/d/1Lc85bqDPopAM8EaN8XAKUMb5otrrWia-/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18424 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 2 (05/2013) . - p. 151-158
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