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Organic–inorganic nanocomposites prepared from fluoro-aramid and silica

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Abstract

Fluoro-aramid-based sol/gel-derived nanocomposites were synthesized by condensing a mixture of 4,4′-(hexafluoro-isopropylidene)dianiline and 1,3-phenylenediamine with terephthaloylchloride (TPC) in dimethylacetamide. TPC was added in slight excess to produce amide chains with carbonyl chloride end groups and then replaced with alkoxy groups using aminophenyltrimethoxysilane to develop bonding with the silica network. Mechanical, dynamic mechanical thermal, water absorption and morphological measurements were carried out on the thin hybrid films. Increase in the tensile strength and modulus was observed as compared to pristine polyamide. The thermal decomposition temperature was found in the range of 400–500 °C. The water absorption was found to be reduced with higher silica content. The glass transition temperature and the storage moduli increased with increasing silica concentration. The maximum increase in the T g value (345 °C) was observed with 20 wt% silica. Scanning electron microscopy revealed the uniform distribution of silica in the matrix with an average particle size ranging from 8 to 50 nm.

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Acknowledgments

Special thanks are due to Professor Dr. Gerhard Wegner and Dr. Ingo Lieberwirth of Max Planck Institute for Polymer Research, Mainz, Germany, for providing the SEM measurement facility.

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Authors and Affiliations

  1. Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan

    Muhammad Ilyas Sarwar & Sonia Zulfiqar

  2. Department of Chemistry, Faculty of Science, Kuwait University, P. O. Box: 5969, Safat, 13060, Kuwait

    Zahoor Ahmad

Authors
  1. Muhammad Ilyas Sarwar
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  2. Sonia Zulfiqar
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  3. Zahoor Ahmad
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Correspondence to Muhammad Ilyas Sarwar.

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Sarwar, M.I., Zulfiqar, S. & Ahmad, Z. Organic–inorganic nanocomposites prepared from fluoro-aramid and silica. Colloid Polym Sci 285, 1733–1739 (2007). https://doi.org/10.1007/s00396-007-1760-3

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  • DOI: https://doi.org/10.1007/s00396-007-1760-3

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