Short Communication

Colloid and Polymer Science

, Volume 285, Issue 15, pp 1733-1739

First online:

Organic–inorganic nanocomposites prepared from fluoro-aramid and silica

  • Muhammad Ilyas SarwarAffiliated withDepartment of Chemistry, Quaid-i-Azam University Email author 
  • , Sonia ZulfiqarAffiliated withDepartment of Chemistry, Quaid-i-Azam University
  • , Zahoor AhmadAffiliated withDepartment of Chemistry, Faculty of Science, Kuwait University

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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.


Aramid Nanocomposites Sol–gel process Stress-strain curves Glass transition temperature Morphology