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Unique properties of carbon nanotubes (CNTs) and Nylon-6 were combined to obtain nanocomposites through in situ polymerization. For this purpose, plasma-polymerized CNTs (CNTM) and raw CNTs were added to in situ polymerization of ε-caprolactam and 6-aminocapropic acid to obtain nanocomposites with 2 and 4% wt/wt of nanotubes. The morphology, phase transitions, thermal stability, dispersion and electrical conductivity were investigated for all samples. Scanning electron microscopy images showed a homogeneous dispersion of CNTs; however, dispersion is known to be better in nanocomposites with CNTM. Furthermore, the crystallization temperature increased up to 50 °C, the melting temperature increased by 20 °C and the degradation temperature increased up to 70 °C for a 10% weight loss. This behavior suggests a synergistic effect for these nanocomposites. The electrical conductivity of nanocomposites with 4% wt/wt reached a maximum of 10−4 S cm−1, suggesting a semiconductive material. Finally, the method used in this work is effective for the dispersion of CNTs, and it can be used to form nanocomposites with improved properties compared with the Nylon-6 homopolymer.

Nanocomposites based on plasma-polymerized carbon nanotubes and Nylon-6