Structure and flow behavior of dilute dispersions of carbon nanotubes in polyacrylonitrile–dimethylsulfoxide solution
| Autor: | Maria M. Klimenko, I. V. Bessonov, Vladimir G. Sergeyev, Nataliya A. Gvozdik, Sergey K. Filippov, Borislav Angelov, Evgeny A. Karpushkin |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Mechanical properties of carbon nanotubes Nanotechnology 02 engineering and technology Carbon nanotube 01 natural sciences law.invention Condensed Matter::Materials Science chemistry.chemical_compound Colloid and Surface Chemistry Rheology law 0103 physical sciences Materials Chemistry Physical and Theoretical Chemistry 010304 chemical physics Scattering Polyacrylonitrile Percolation threshold 021001 nanoscience & nanotechnology Condensed Matter::Soft Condensed Matter Chemical engineering chemistry Small-angle scattering 0210 nano-technology Macromolecule |
| Zdroj: | Colloid and Polymer Science. 294:1187-1195 |
| ISSN: | 1435-1536 0303-402X |
| DOI: | 10.1007/s00396-016-3878-7 |
| Popis: | Rheological behavior of carbon nanotubes (at the concentration below the percolation threshold) finely dispersed in semidilute polyacrylonitrile–dimethylsulfoxide solution has been studied as a function of the applied pre-shear stress and discussed in view of possible structural changes induced by pre-shearing of the samples. The observed effects have been ascribed to a combination of processes involving alignment and association of the macromolecules as well as orientation and association of carbon nanotubes. The effects caused by the macromolecules alignment and association are mainly observed at low concentration of the filler and at high shear stress, whereas the processes involving carbon nanotubes reorganization are mainly observed at the higher filler content and at lower pre-shear stress. The nanotubes rearrangement under shear has been probed via hyphenated rheology–synchrotron X-ray small-angle scattering measurement. |
| Databáze: | OpenAIRE |
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