Effect of montmorillonite addition (modified and unmodified) on the structural, mechanical, thermal, and morphological properties of nanocomposites based poly(vinyl chloride) / Badra Bouchareb in MATERIAUX & TECHNIQUES, Vol. 110, N° 1 (13/06/2022)  

[article]  inMATERIAUX & TECHNIQUES > Vol. 110, N° 1 (13/06/2022) . - 12 p. 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 [article]

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Role of wood flour on physical and mechanical properties in polymer matrix composites - a critical review / Lalit Ranakoti in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 2 (04/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 2 (04/2021) . - p. 81-92 Titre : Role of wood flour on physical and mechanical properties in polymer matrix composites - a critical review Type de document : texte imprimé Auteurs : Lalit Ranakoti, Auteur ; Pawan Kumar Rakesh, Auteur ; Brijesh Gangil, Auteur Année de publication : 2021 Article en page(s) : p. 81-92 Note générale : Bibliogr. Langues : Français (fre) Catégories : Bois Charges (matériaux) Composites à matrice organique Composites thermoplastiques -- Extrusion Composites thermoplastiques -- Moulage par injection Composites thermoplastiques -- Propriétés mécaniques Composites thermoplastiques -- Propriétés physiques Farines végétales Nanoparticules Résistance au chocs Index. décimale : 668.4 Plastiques, vinyles Résumé : Green and sustainable material is the utmost prerequisite for the advancement of a healthy society and fulfilling the necessary for the improvement in material science. Naturally obtaining wood flour has the competence to be reinforced as a filler substance in the polymer composite. The present article deals with the usage of wood flour as a filler in the polymer composite. The article comprises properties, characteristics, occurrence, the structure of wood, and the techniques implemented in the manufacturing of wood flour polymer composites. In addition, critical parameters and causes that can bring changes in the properties like tensile, flexural, impact and hardness of polymers are also discussed with the addition of wood flour alone and with nanoparticles. The advantages of using wood flour as a filler in the thermoset and thermoplastic polymers discussed, and its hybridization with various natural fibers was also discussed in the present study. Note de contenu : - Manufacturing of wood flour composite injection moulding - Extrusion process - Wood flour composites : Mechanical properties of wood flour plastics - Mechanical properties of wood flour polymer nanocomposite - Applications and future scope of WF polymer composite - Table 3 : Impact strength of WF-polymer composites DOI : https://doi.org/10.18280/rcma.310203 En ligne : https://www.iieta.org/download/file/fid/54553 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37660 [article]

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