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Studies on polypropylene composites filled with talc particles

Part I Mechanical properties

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Abstract

Tensile and impact properties of talc-filled isotactic polypropylene composites are investigated at 0–60 wt% filler contents. Tensile modulus registered an increase whereas tensile yield strength and strain-at-break decreased with increasing filler content. Mechanical restraint imposed by the talc particles on the molecular mobility or deformability of polypropylene explained the increase in modulus and decrease in strain-at-break while decrease in tensile yield strength was attributed to decreased crystallinity and formation of stress concentration points around the filler particles. Izod impact strength decreased with increased talc content. Surface modification of talc with a titanate coupling agent LICA 38 enhanced the filler-polymer interaction, further modifying the composite properties consequent upon significant decrease in the stress concentration. Scanning electron microscopic studies revealed better dispersion of surface-modified filler particles in the polymer matrix.

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Authors and Affiliations

  1. Centre for Material Science and Technology, Indian Institute of Technology, 110 016, New Delhi, India

    S. N. Maiti & K. K. Sharma

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  1. S. N. Maiti
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  2. K. K. Sharma
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Maiti, S.N., Sharma, K.K. Studies on polypropylene composites filled with talc particles. J Mater Sci 27, 4605–4613 (1992). https://doi.org/10.1007/BF01165994

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  • DOI: https://doi.org/10.1007/BF01165994

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