Morphologies,interfacial interaction and mechanical performance of super-tough nanostructured PK/PA6 blends |
| |
Institution: | Department of Electrical Engineering, Indian Institute of Technology (BHU), Varanasi, India;College of Materials Science and Engineering, Henan Key Laboratory of Advanced Nylon Materials and Application, Zhengzhou University, Zhengzhou 450001, China |
| |
Abstract: | Nanostructured polyketone (PK)/polyamide 6 (PA6) blends can be readily prepared via melt blending technologies and exhibit ultra-high toughness when PA6 is present as the nanoscale phase domains. When PA6 content is 30 vol%, the impact strength of the blends increases from 21.4 kJ/m2 of pure PK to 103.2 kJ/m2. The impact strength of the PK/PA6 blends with a 5:5 composition ratio reaches as high as 113 kJ/m2. The strong intermolecular force between PK and PA6 molecular chains enables the PA6 nanophase to cavitate to dissipate a significant amount of impact energy and effectively prevents the crack propagation or even terminates the cracks. The fracture mechanism of the PK/PA6 blends was further examined by the essential work of fracture method which proves that PK/PA6 blends show improved ability to prevent crack propagation. This work may deepen the understanding of polymer blend systems with strong hydrogen bonding interaction. |
| |
Keywords: | PK/PA6 blends Nanostructured blends High toughness |
本文献已被 ScienceDirect 等数据库收录! |
|