Linear viscoelasticity of PP/PS/MWCNT composites with co-continuous morphology

Strugova, Daria, David, Éric et Demarquette, Nicole R.. 2022. « Linear viscoelasticity of PP/PS/MWCNT composites with co-continuous morphology ». Journal of Rheology, vol. 66, nº 4. pp. 671-681.
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Résumé

In this work, a study of the linear viscoelastic properties of co-continuous polypropylene/polystyrene blends filled with multiwall carbon nanotubes (MWCNTs) is presented. The YZZ rheological model [W. Yu et al., Polymer 51, 2091–2098 (2010)] is employed to correlate the rheological behavior of the blends with their microstructure and electrical properties. A test design involving a sequence of small amplitude oscillatory shear and a time sweep (simulating thermal annealing) is used to evaluate the morphology and evolution of electrical properties. It was shown that the YZZ rheological model could be successfully modified to be able to quantify a co-continuous morphology of filled composites. The calculated characteristic domain size was found to be in good agreement with the experimental data obtained via scanning electron microscopy. Furthermore, it is shown that the characteristic domain size slightly decreased after 30 min of thermal annealing. It was shown, as well, that thermal annealing promoted a reduction in the electrical percolation threshold (wt. % MWCNT) from 0.28 to 0.06.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur David, Éric Demarquette, Nicole R.
Affiliation:	Génie mécanique, Génie mécanique
Date de dépôt:	09 mai 2022 15:48
Dernière modification:	02 juin 2022 14:57
URI:	https://espace2.etsmtl.ca/id/eprint/24339

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