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<p>In this work, the influence of different screw designs and speeds of a twin-screw extruder on the mechanical properties of nylon 6/graphene nanoplatelet (GnP) nanocomposites is investigated. Nanocomposites are prepared using 3 wt% GnPs and three screw designs designated as high, medium and low shear screws at speeds of 100, 200 and 300&#xa0;rpm. Tensile and Charpy impact tests are performed to investigate the mechanical properties of nanocomposites. An increase in the Young’s modulus (in the range of 4.3% to 29.7%) is observed for all nanocomposite samples as compared to neat nylon 6 while tensile strength is either reduced or increased. It is also observed that nanocomposites have a lower strain at break (in the range of 82.9% to 95.2%) and a corresponding reduction in the tensile energy at break (in the range of 88.3% to 97.3%). Furthermore, nanocomposites exhibit lower impact strength (in the range of 25.2% to 65.6%) compared to neat nylon 6, and the screw designs influence this impact strength variation.</p>

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Influence of extruder screw designs and speeds on the mechanical properties of melt-blended nylon 6-graphene nanoplatelet nanocomposites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月17日

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  • Suhail Attar,
  • Biqiong Chen,
  • Giuseppe Catalanotti,
  • Brian G. Falzon

摘要

In this work, the influence of different screw designs and speeds of a twin-screw extruder on the mechanical properties of nylon 6/graphene nanoplatelet (GnP) nanocomposites is investigated. Nanocomposites are prepared using 3 wt% GnPs and three screw designs designated as high, medium and low shear screws at speeds of 100, 200 and 300 rpm. Tensile and Charpy impact tests are performed to investigate the mechanical properties of nanocomposites. An increase in the Young’s modulus (in the range of 4.3% to 29.7%) is observed for all nanocomposite samples as compared to neat nylon 6 while tensile strength is either reduced or increased. It is also observed that nanocomposites have a lower strain at break (in the range of 82.9% to 95.2%) and a corresponding reduction in the tensile energy at break (in the range of 88.3% to 97.3%). Furthermore, nanocomposites exhibit lower impact strength (in the range of 25.2% to 65.6%) compared to neat nylon 6, and the screw designs influence this impact strength variation.