Nylon-6 and single-walled carbon nanotubes polyamide composites: Formulation and characterization

作者：Zabegaeva Olesya N; Sapozhnikov Dmitriy A; Buzin Mikhail I; Krestinin Anatoliy V; Kotelnikov Viktor A; Baiminov Bato A; Afanasyev Egor S; Pashunin Yuriy M; Vygodskii Yakov S^*

来源：High Performance Polymers, 2017, 29(4): 411-421.

DOI：10.1177/0954008316645848

• Nanocomposites
• nylon-6
• -caprolactam anionic polymerization
• functionalized carbon nanotubes
• polyimides

Two methods for the functionalization of single-walled nanotubes were proposed, namely grafting of acyllactam groups or amine-terminated polyimides. Such modification allows for the preparation of stable nonsagging nanotubes dispersions in the melted -caprolactam. These dispersions were further utilized for in situ ring-opening anionic polymerization of -caprolactam with -caprolactam magnesium bromide as a catalyst and N-acetyl--caprolactam as an activator. Some unique features of the obtained novel nylon-6/nanotubes composites are significantly increased thermal stability (T-5% up to 400 degrees C), enhanced compression modulus and Izod impact strength of polymer blocks (by 25% and 150%, respectively) and advanced tensile strength and elongation of polymer films. Such an improvement in the properties of the composites in comparison with neat nylon-6 was gained by the addition of as little as 0.1-0.01 wt% of modified nanotubes.

• 出版日期2017-5