Impact of Micro Silica Filler Particle Size on Mechanical Properties of Polymeric Based Composite Material

Sidra Siraj, Ali H. Al-Marzouqi, Muhammad Z. Iqbal, Waleed Ahmed

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In this study, silica in the form of raw local natural sand was added to high-density-polyethylene (HDPE) in order to develop a composite material in the form of sheets that could have potential applications in thin film industries, such as packaging, or recycling industries, such as in 3D printing. The silica/HDPE composite sheets were developed using a melt extruder followed by using a hot press for compression molding. The impact of two different particle sizes (25 µm and 5 µm) of the silica particles on selected properties such as toughness, elastic modulus, ductility, and composite density were analyzed. A considerable increase in the toughness and elastic modulus was observed from 0 wt% to 20 wt% with a 25 µm filler size. However, a general decreasing trend was observed in the material’s toughness and elastic modulus with decreasing particle size. A similar trend was observed for the ductility and the tensile strength of the sheets prepared from both filler particle sizes. In terms of the composite density, as the filler was increased from 20 wt% to 50 wt%, an increase in the composite densities was noticed for both particle sizes. Additionally, the sheets developed with 25 µm particle size had a slightly higher density than the 5 µm particle size, which is expected as the size can account for the higher weight. Results from this work aim to analyze the use of local sand as a filler material that can contribute towards maximizing the potential of such composite materials developed in extrusion industries.

Original languageEnglish
Article number4830
Issue number22
Publication statusPublished - Nov 2022


  • HDPE
  • composite
  • polymer
  • sand
  • sheets
  • silica

ASJC Scopus subject areas

  • General Chemistry
  • Polymers and Plastics


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