Table 1: PNC compositions for both sets of tested specimens. Synthetic for NPC filled with nanoclays from Topy and natural for PNC filled with Cloisite 20A.

Given name PP (%) Antioxidants (%) Compatibilizer (%) Nanoclay (%) Type PP1-0% 82.4 0.2 17.4 0 — PP2-0% 87.0 0.2 12.8 0 — PP1-S1% 81.6 0.2 17.2 1 Synthetic PP1-S2% 80.7 0.2 17.1 2 Synthetic PP1-S4% 79.1 0.2 16.7 4 Synthetic PP1-S8% 75.8 0.2 16 8 Synthetic PP2-N2% 85.3 0.2 12.5 2 Natural PP2-N6% 81.8 0.2 12 6 Natural