Tailoring the graphene oxide chemical structure and morphology as a key to polypropylene nanocomposite performance
نویسندگان
چکیده
In this work, we designed and studied two synthetic routes, based on modified Hummers method, to obtain graphene oxide (GO), investigated their influence the performance of polypropylene (PP)/GO nanocomposites. The routes differed in application condition oxidizing agent, potassium permanganate (KMnO4), which was added either as a powder (GO-P) or water solution (GO-S). This apparently subtle change yielded GOs with different degrees oxidation particle sizes, where GO-P presented higher degree smaller particles. were then melt-blended PP correlation between chemical/morphological structures nanocomposites' thermomechanical/rheological properties evaluated. milder process suffered by GO-S, consequent less hydrophilic character, PP/GO-S nanocomposite improved consequence better matrix/filler chemical affinity, mainly compositions lower GO-S contents. thermal stability increased more than 10°C when 0.1 wt% inserted into PP. When compared composition GO-P, increase 13°C. Reinforcing effects also observed that sample (with GO-S), exhibited highest storage modulus complex viscosity. These results suggest tailoring GO's morphology is key point an ideal interfacial interaction phases.
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ژورنال
عنوان ژورنال: Polymer Composites
سال: 2021
ISSN: ['0272-8397', '1548-0569']
DOI: https://doi.org/10.1002/pc.26297