[article]
| Titre : |
Effect of montmorillonite addition (modified and unmodified) on the structural, mechanical, thermal, and morphological properties of nanocomposites based poly(vinyl chloride) |
| Type de document : |
texte imprimé |
| Auteurs : |
Badra Bouchareb, Auteur ; Nacerddine Haddaoui, Auteur ; Sarwat Zahra, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
12 p. |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Argile
Chlorure de polyvinyle
Composites thermoplastiques -- Propriétés physiques
Montmorillonite
Nanoparticules
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Poly(vinyl chloride)/ montmorillonite nanocomposites were prepared using a melt mixing technique. For this purpose, three montmorillonite samples (MMT) namely, raw montmorillonite (R-MMT), sodium montmorillonite (Na+-MMT) and organically modified montmorillonite (O-MMT) were used with different contents (0, 1, 3, 5, 7 and 9 phr) in the presence of dioctyl phthalate (DOP). X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), Differential Scanning Calorimetry (DSC), and mechanical testing were used to investigate the physical properties of nanocomposites (PVC/MMT). The results of XRD show that macromolecule chains of PVC may be intercalated or exfoliated into the gallery of modified montmorillonite (Na+-MMT and O-MMT). Microcomposites structure is formed on the PVC/R-MMT nanocomposites when the unmodified montmorillonite (R-MMT) content is added from 1 to 9 phr. However, the glass transition temperature (Tg) of PVC/O-MMT nanocomposites is shifted slightly to lower temperatures. Furthermore, O-MMT plays the role of an internal plasticizer hence increases the distance between macromolecule chains of the polymer. Consequently, the degree of interactions between the chains decreases inducing a decrease in Tg. Synergy effect is also observed on the PVC/O-MMT nanocomposites with the increase in the amount of O-MMT. The morphological study by AFM shows a reduction in surface roughness under the effect of montmorillonite modified, and particularly with (1 phr) of O-MMT. |
| Note de contenu : |
- MATERIALS AND METHODS : Material - Preparation of PVC/MMT nanocomposite
- METHODS : X-ray diffraction (XRD) - Tensile test - Hardness - Differential Scanning Calorimetry (DSC) - Atomic Force Microscopy (AFM)
- RESULTS AND DISCUSSION : X-ray diffraction (XRD) - Tensile test - Hardness test - Differential Scanning Calorimetry (DSC) - Atomic Force Microscopy (AFM)
- Table 1 : Formulations realized with R-MMT, Na+ -MMT and O-MMT
- Table 2 : Tensile properties of PVC/R-MMT, PVC/Na + -MMT and PVC/O-MMT nanocomposites with modified and unmodified MMT
- Table 3 : Results of DSC analysis (glass transition temperature) of PVC films and its nanocomposites
- Table 4 : RMS values of different nanocomposites |
| Référence de l'article : |
103 |
| DOI : |
https://doi.org/10.1051/mattech/2022011 |
| En ligne : |
https://www.mattech-journal.org/articles/mattech/pdf/2022/01/mt210028.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37814 |
in MATERIAUX & TECHNIQUES > Vol. 110, N° 1 (13/06/2022) . - 12 p.
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