The effects of thickness reduction and particle sizes on the properties graphite - Polypropylene composite

M. Z. Selamat, J. Sahari, Norhamidi Muhamad, Andanastuti Muchtar

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Over the past decade, rapid progress has been made in understanding and development of Conductive Polymer Composites (CPC). The deformations through pressing processes of CPC have significant effects on its properties especially electrical conductivity. In this research, focus is given to Polypropylene (PP)-graphite (G) composites. The G with the various sizes (40, 100, 150 and 200 μm) and binder are mixed with ratios of 80:20 according to weight percentage is selected to produce samples. A Rheomix mixer (Haake-Polylab TM) with 50 cm 3 mixing chamber was used for composites compounding or mixing process. After that the mixtures were shaped through compression molding to form disc with 25 mm diameter and average thickness of 7.5 mm. The disc was then deformed through pressed with the thickness reduction of 25%, 50% and 75% at the temperatures of 190°C. The related tests such as conductivity measurements in the plane direction and microstructure analysis used Scanning Electron Microscope (SEM) have been conducted in determining the effect of thickness reduction on the properties of the disc. The disc with the thickness reduction of 25% has shows good affect on the properties especially the microstructure and the electrical properties. The electrical conductivity has increased between 20% up to 110% as compare to unpress disc.

Original languageEnglish
Pages (from-to)194-200
Number of pages7
JournalInternational Journal of Mechanical and Materials Engineering
Volume6
Issue number2
Publication statusPublished - Aug 2011

Fingerprint

Graphite
Polypropylenes
Particle size
Composite materials
Polymers
Microstructure
Compression molding
Binders
Electric properties
Electron microscopes
Scanning
Temperature
Electric Conductivity

Keywords

  • Conductive polymer composites (CPC)
  • Conductivity
  • Graphite
  • Microstructure

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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abstract = "Over the past decade, rapid progress has been made in understanding and development of Conductive Polymer Composites (CPC). The deformations through pressing processes of CPC have significant effects on its properties especially electrical conductivity. In this research, focus is given to Polypropylene (PP)-graphite (G) composites. The G with the various sizes (40, 100, 150 and 200 μm) and binder are mixed with ratios of 80:20 according to weight percentage is selected to produce samples. A Rheomix mixer (Haake-Polylab TM) with 50 cm 3 mixing chamber was used for composites compounding or mixing process. After that the mixtures were shaped through compression molding to form disc with 25 mm diameter and average thickness of 7.5 mm. The disc was then deformed through pressed with the thickness reduction of 25{\%}, 50{\%} and 75{\%} at the temperatures of 190°C. The related tests such as conductivity measurements in the plane direction and microstructure analysis used Scanning Electron Microscope (SEM) have been conducted in determining the effect of thickness reduction on the properties of the disc. The disc with the thickness reduction of 25{\%} has shows good affect on the properties especially the microstructure and the electrical properties. The electrical conductivity has increased between 20{\%} up to 110{\%} as compare to unpress disc.",
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