Polypropylene Carbon Nanotubes Nanocomposites: Combined Influence of Block Copolymer Compatibilizer and Melt Annealing on Electrical Properties
| Autor: | Christian Bailly, Fang Fang Tao, Aline Emplit, Isabelle Huynen, Pascale Lipnik, Guido Heunen |
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| Rok vydání: | 2017 |
| Předmět: |
Polypropylene
Materials science Nanocomposite Article Subject Annealing (metallurgy) 02 engineering and technology Carbon nanotube Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Agglomerate lcsh:Technology (General) Copolymer lcsh:T1-995 General Materials Science Composite material 0210 nano-technology Microwave |
| Zdroj: | Journal of Nanomaterials, Vol 2017 (2017) |
| ISSN: | 1687-4129 1687-4110 |
| DOI: | 10.1155/2017/9075878 |
| Popis: | We study the influence of melt annealing and the presence of a block copolymer compatibilizer on the electrical properties of polypropylene carbon nanotubes (CNT) nanocomposites from the DC limit to microwave frequencies and link it to the morphological details. We show that the compatibilizer concentration controls three types of morphologies: separate CNT agglomerates, a network of well dispersed but interconnected CNT, and individualized but separate nanotubes. This explains why conductivity reaches an optimum over the whole frequency range at a low compatibilizer concentration. We model the corresponding structures by a semiquantitative schematic equivalent electrical circuit. A key outcome of the work is the understanding and control of dispersion mechanisms in order to optimize the electrical performances for efficient EMI shielding depending on the targeted frequency range. |
| Databáze: | OpenAIRE |
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