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Etude de la réalisation de nanocomposites polypropylène/argile
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lertwimolnun, Wiboon Vergnes, Bruno |
| Copyright Year | 2003 |
| Abstract | Polypropylene/organoclay nanocomposites have been prepared via direct melt intercalation in an internal mixer. The maleic anhydride grafted polypropylene (PP-g-MA) was used as a compatibilizer to improve the dispersibility of the clay. The structures of nanocomposites have been characterized by X-ray diffraction, transmission electron microscopy as well as melt rheology. The effect of concentration of PP-g-MA and processing parameters was investigated. It is found that the degree of dispersion depends on both concentration and processing conditions. Optimizing the process conditions can minimize the necessary amount of PP-g-MA. The study of linear viscoelastic properties show that the storage modulus G' is sensitive to the microstructure of nanocomposites. In some cases, rheometry is more sensitive than X-ray diffraction measurements = Des nanocomposites polypropylene/argile modifiee ont ete prepares par melange a l'etat fondu a l'aide d'un melangeur interne. Un polypropylene fonctionnalise anhydride maleique (PP-g-MA) a ete utilise comme compatibilisant afin d'ameliorer la qualite de la dispersion. Le degre de dispersion a ete caracterise par la diffraction des rayons X, la microscopie electronique en transmission et les mesures rheologiques en regime dynamique. L'effet de la concentration de PP-g-MA et des conditions operatoires a ete examine. On montre que le degre de dispersion depend a la fois de la concentration en PP-g-MA et des conditions de malaxage. La concentration de PP-g-MA peut etre minimisee par l'optimisation des conditions de mise en oeuvre. Les mesures rheologiques montrent que les modules G' sont tres sensibles au niveau de dispersion. Dans certains cas, ces mesures sont beaucoup plus sensibles que celles de la diffraction des rayons X. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://hal-mines-paristech.archives-ouvertes.fr/hal-00579408/file/Lertwimolnun-Brest2003.pdf |
| Alternate Webpage(s) | https://hal-mines-paristech.archives-ouvertes.fr/hal-00579408/document |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
