Mechanical properties of Polyamide-12 layered silicate nanocomposites and their relations with structure

Nourredine Aït Hocine (1) , Pascal Mederic (1) , Thierry Aubry (1)

1 LIMATB - Laboratoire d'Ingénierie des Matériaux de Bretagne

The mechanical properties of polyamide-12/Cloisite 30B (PA12/C30B) nanocomposites prepared by melt compounding were studied as a function of clay volume fraction φ under various processing conditions. All measured mechanical characteristics, Young's modulus, yield stress, strain at break and stress at break, exhibit a transition at φp∼1%, identified with a percolation threshold. Also, the linear and non-linear mechanical properties appeared to depend on the degree of exfoliation of the structure, which can be tuned by the processing conditions. The three-phase Ji's theoretical model was used to predict Young's modulus as a function of clay concentration, focusing on the influence of the degree of exfoliation. Experimental yield stress data were fitted to Pukanszky's model and discussed in terms of PA12/C30B interfacial adhesion.

Domaines: Sciences de l'ingénieur [physics]

Nourredine Aït Hocine, Pascal Mederic, Thierry Aubry. Mechanical properties of Polyamide-12 layered silicate nanocomposites and their relations with structure. Polymer Testing, 2008, 27 (3), pp.330-339. ⟨10.1016/j.polymertesting.2007.12.002⟩. ⟨hal-00400543⟩