Dynamic mechanical properties of whisker/PA66 composites at high strain rates

• Published in: Polymer (Guilford) Vol. 46; no. 10; pp. 3528 - 3534
• Main Authors: Hao, Xiangyang, Gai, Guosheng, Lu, Fangyun, Zhao, Xijin, Zhang, Yihe, Liu, Jiping, Yang, Yufen, Gui, Dayong, Nan, Ce-wen
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 25.04.2005; Elsevier
• Subjects: Applied sciences; Composite; Composites; Exact sciences and technology; Forms of application and semi-finished materials; Polymer industry, paints, wood; Potassium titanate whisker (TKW); Split Hopkinson pressure bar (SHPB); Technology of polymers; Composite; Potassium titanate whisker (TKW); Split Hopkinson pressure bar (SHPB); Strain rate sensitivity; Stress strain relation; Mechanical properties; Organic silane; Dispersion reinforced material; Experimental study; Composite material; Whisker; Compressive stress; Potassium Titanates; Dynamic mechanical properties; Amide 66 polymer
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2005.02.042

PA66 reinforced with potassium titanate whisker (TKW) treated with silane coupling agent were prepared using a twin-screw extruder. The quasi-static and dynamic mechanical properties were investigated. Addition of 40 wt % TKW to PA66 improves all the investigated properties. The high-speed dynamic tests with TKW/PA66 were carried on split Hopkinson pressure bar (SHPB). The loading pulses in SHPB experiments were precisely controlled to ensure that the composite specimens deformed at a nearly constant strain rate under dynamically equilibrated stress during dynamic compression. The constitutive curves and equations at high strain rates have been obtained. TKW/PA66 composites show 20–100% increase on reference modulus and 20% increase on compression strength.