Graphene and nanoclay as processing aid agents: A study on rheological behavior in polystyrene

Genoyer, Julie, Helal, Emna, Gutierrez, Giovanna, Moghimian, Nima, David, Eric et Demarquette, Nicole R.. 2023. « Graphene and nanoclay as processing aid agents: A study on rheological behavior in polystyrene ». C-Journal of Carbon Research, vol. 9, nº 4.

Prévisualisation

PDF Helal-E-2023-28268.pdf - Version publiée Licence d'utilisation : Creative Commons CC BY. Télécharger (7MB) | Prévisualisation

Résumé

The effectiveness of layered particles as processing aid agents in molten polystyrene was studied. Three graphene grades and two clays of different lateral size were selected for this purpose. The morphologies of the composites were observed using scanning electron microscopy. Steady shear measurements were carried out and the Carreau–Yasuda model with yield stress was applied to the experimental results. A decrease in viscosity was observed at 2 wt.% of particle content for almost all composites. The most efficient particle for reducing viscosity was found to be graphene in a loose agglomerated configuration. Graphene and clay particles with similar dispersion states had a similar effect on the viscosity, inducing a decrease by 29% and 22%, respectively, suggesting comparable efficiency as processing aid agents. The observed decrease in viscosity is attributed to the phenomenon of superlubricity, which is a lubricating mechanism that is closely linked to the atomic structure of the particles.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Helal, Emna David, Éric Demarquette, Nicole R.
Affiliation:	Génie mécanique, Génie mécanique, Génie mécanique
Date de dépôt:	12 janv. 2024 14:50
Dernière modification:	06 févr. 2024 19:35
URI:	https://espace2.etsmtl.ca/id/eprint/28268

Actions (Authentification requise)

Dernière vérification avant le dépôt