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Structural, elastic and thermal properties of titanium dioxide filled isotactic polypropylene


Titanium dioxide (TiO2)-filled isotactic polypropylene (iPP) composites with various contents of TiO2 were prepared by a locally fabricated extrusion molding machine. The extrudates were melt-pressed at 180 °C and produced as plane sheets of nearly equal thickness by rapid cooling. X-ray diffraction studies reveal a decrease of crystallinity and crystallites size as well as a change of α-, β- and γ-crystalline phases of the neat iPP to the α-form due to filler inclusion. Scanning electron micrographs taken on the fractured surface of the samples show increasing amount of voids with increasing filler content. Tensile strength, elongation-at-break (%) and glass transition temperature of the samples are found to decrease considerably with the increase in TiO2 content, whereas microhardness decreases slightly with the filler content.

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The authors greatly acknowledge the financial support provided by the Bangladesh University of Engineering and Technology (BUET) for performing this investigation. They are also grateful to the Department of Materials and Metallurgical Engineering, BUET and Industrial Physics Division, BCSIR for technical supports of DSC and SEM measurements, respectively.

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Correspondence to Mohammad Jellur Rahman.

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Bhuiyan, A.H., Mina, M.F., Seema, S. et al. Structural, elastic and thermal properties of titanium dioxide filled isotactic polypropylene. J Polym Res 18, 1073–1079 (2011).

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  • Isotactic polypropylene
  • X-ray diffraction
  • Microhardness
  • Tensile strength