Influence of mixing energy on the solid-state behavior and clay fraction threshold of PA12/C30B® nanocomposites

Nourredine Aït Hocine; Pascal Médéric; Hanaya Hassan

doi:10.1515/polyeng-2018-0307

Article

Influence of mixing energy on the solid-state behavior and clay fraction threshold of PA12/C30B^® nanocomposites

Nourredine Aït Hocine , Pascal Médéric and Hanaya Hassan

Published/Copyright: May 15, 2019

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From the journal Journal of Polymer Engineering Volume 39 Issue 6

Abstract

This study focuses on the influence of mixing energy on the solid-state behavior and clay fraction threshold of nanocomposites. Thus, three polyamide12/clay (PA12/C30B^®) nanocomposites exhibiting different nanostructures were prepared from three sets of processing conditions. Then, thermal and dynamical viscoelastic properties of these nanocomposites were analyzed, in relationship with the material nanostructure and processing conditions. For the first time, the solid-state properties of the nanocomposites revealed the existence of a critical specific mixing mechanical energy. Below this critical value, an increase of mechanical energy refines the structure, improving some end-use properties of the nanocomposite. Above this value, a high mixing energy supply is necessary in order to significantly modify the structure. They also highlighted that the clay fraction threshold, which is commonly attributed to the formation of a three-dimensional percolated network, decreases with increasing specific mixing energy, less significantly when this energy is superior to its critical value.

Keywords: mixing energy; nanocomposites; organoclay; polyamide; solid-state properties

Acknowledgments

The authors thank Ludovic Teffo from the University of Brest and Emmanuel Penaud from the University of Tours for preparing PA12/C30B^® specimens used in the dynamical mechanical thermal analysis tests. They also thank the Centre d’Etude et de Recherche sur les Matériaux Elastomères (CERMEL) of the Université François-Rabelais de Tours (37000), France, for the technical help provided.

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Received: 2018-11-10

Accepted: 2019-04-02

Published Online: 2019-05-15

Published in Print: 2019-07-26

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Articles in the same Issue

https://doi.org/10.1515/polyeng-2018-0307

Keywords for this article

mixing energy; nanocomposites; organoclay; polyamide; solid-state properties