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Abstract
ABSTRACTThis article focuses on the hybridization of thermoplastic polymer matrices with conducting polymers and graphene derivatives. Polypropylene (PP), polymethylmethacrylate (PMMA) and polyoxymethylene (POM) were used as primary polymer matrices and polypyrrole (PPY) and polyaniline (PANI) as secondary conducting polymers. Highly conductive-reduced graphene oxide (rGO) and graphene (G) have been used as reinforcements. A Taguchi analysis has been performed for the blends to find the optimal combination of the blends with respect to electrical conductivity (σ) and mechanical properties. Both electrical and mechanical properties were improved by the hybridization process. The maximum electrical conductivity of 0.85 S.cm−1 has been acquired with POM/PPY/G blend with 3 wt.% and 5 wt.% of PPY and graphene loading, respectively. The mechanical properties have been found to improve with all the blends but, PP/PPY/G blend with 3 wt.% and 6 wt.% of PPY and graphene loading displays overall better properties in comparison with other blends.
Highlights
Polymer nanocomposites represent a new alternative to conventionally filled polymers
The intersheet spacings for reduced graphene oxide (rGO)/G in the PMMA hybrid nanocomposites were significantly larger than those seen in PP and POM hybrids with similar graphene oxide/polymer mass ratios
PMMA chains would likely remain in looped conformations, which would more efficiently pack within the intersheet boundary, fitting well into the waving structures of the nanosheets of graphene derivative [58,59]
Summary
Polymer nanocomposites represent a new alternative to conventionally filled polymers. Graphene is an exciting nanomaterial being widely investigated today for its potential applications in a wide range of areas, such as flexible electronic devises, shape memory polymers, sensors photovoltaic devices, conductive nanofibers, antibacterial composites, energy conversion, and storage [3,4] It exhibits attractive mechanical, electrical, physical, and chemical properties, which can be utilized in polymers to enhance their properties. ● In prior work, simple composite blends have been attempted and most of the researchers did not consider complex blends or hybridization to overcome the limitation of adding graphene material above a certain level This would have allowed the addition or use of other possible materials to add along with graphene to improve electrical and mechanical properties. This led us to develop three component hybrid composite systems to understand their effects on final targeted properties
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