Mechanical Properties and Wear Behavior of Polypropylene/Hydroxyapatite Nanocomposite

Document Type : Original Article

Authors

Faculty of Material Engineering/ Department of polymer and petrochemical engineering/University of Babylon/Iraq.

Abstract

In this study, polypropylene (PP)/nano-hydroxyapatite (HA) nanocomposites were prepared using a twin-screw extruder to investigate the effect of different weight percentages of nano-HA (1, 2, and 3 wt.%) on the mechanical and tribological properties of PP. The tensile properties (i.e., tensile strength, modulus, and elongation at break) of the nanocomposites were determined; also, hardness, wear properties, and Fourier transform spectroscopy (FTIR), Scanning electron microscope (SEM), Differential scanning calorimetry (DSC) and contact angle (CA) were performed. The tensile test results showed that tensile strength and elongation increased to 23 MPa at 2% wt. of HA, while both Modulus and hardness increased with the increase in nano-HA content. By contrast, the wear rate and coefficient of friction (COF) decreased with the increase in nano-HA content. The FTIR results showed that only a physical interaction occurred between PP and nano-HA. SEM images indicate that there is a good dispersion of nano-HA within PP matrix. DSC results show that thermal stability improved with the addition of nanoHA.

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Volume 65, Issue 10
October 2022
Pages 657-665
  • Receive Date: 15 December 2021
  • Revise Date: 07 February 2022
  • Accept Date: 24 February 2022
  • First Publish Date: 24 February 2022