Studies on composite filaments from nanoclay reinforced polypropylene |
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Authors: | Email author" target="_blank">Mangala?JoshiEmail author M?Shaw B?S?Butola |
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Institution: | (1) Rubber Technology Centre, Indian Institute of Technology, Kharagpur, 721302, India;(2) Present address: Indian Institute of Technology, Patna, 800013, India; |
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Abstract: | The development of high tenacity, high modulus monofilaments from Polypropylene/Clay nanocomposite has been investigated.
Pure sodium montmorillonite nanoclay was modified using hexadecyl trimethyl ammonium bromide (HTAB) via an ion exchange reaction.
Pure and modified clay were characterized through X-ray diffraction, FTIR and TGA. The modified clay was melt blended with
polypropylene (PP) in presence of a swelling agent. Composite filaments from PP/Clay nanocomposite were prepared at different
weight percentages of nanoclay and the spinning and drawing conditions were optimized. The filaments were characterized for
their mechanical, morphological and thermal properties. The composite PP filaments with modified clay showed improved tensile
strength, modulus and reduced elongation at break. The composite filaments with unmodified clay did not show any improvement
in tensile strength but the modulus improved. The sharp and narrow X-ray diffraction peaks of PP/nanoclay composite filaments
indicate increase in crystallinity in presence of modified clay at small loadings (0.5%). The improved thermal stability was
observed in filaments with modified as well as unmodified clays. |
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