Stabilizing Thin Film Polymer Bilayers against Dewetting Using Multiwalled Carbon Nanotubes
| Autor: | Kwanwoo Shin, Jaseung Koo, Seongchan Park, Benjamin S. Hsiao, Jonathan Sokolov, Kyunghwan Yoon, Miriam Rafailovich, Xuming Chen, Tadanori Koga, Young-Soo Seo, Sushil Satija |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Nanocomposite Materials science Polymers and Plastics Diffusion Organic Chemistry Nanotechnology Mechanical properties of carbon nanotubes Carbon nanotube Polymer Condensed Matter::Mesoscopic Systems and Quantum Hall Effect law.invention Condensed Matter::Soft Condensed Matter Inorganic Chemistry Condensed Matter::Materials Science chemistry Chemical engineering Rheology law Materials Chemistry Dewetting Thin film |
| Zdroj: | Macromolecules. 40:9510-9516 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma071550l |
| Popis: | We have investigated the effect of the length of multiwalled carbon nanotubes (MWNT) on the dewetting dynamics of thin polymer films. The results indicated that long nanotubes were much more effective than short nanotubes in stabilizing the films against dewetting. The diffusion of polymer chains in the filled matrices was measured using neutron reflectivity, and the result indicated no significant effect on the diffusion coefficient by either short or long nanotubes. We therefore proposed a model whereby the nanotubes did not interact with the individual polymer chains. On the other hand, the long nanotubes formed an effective entangled network, which prevented long-range motion of the polymer films upon dewetting. This model was supported by rheological experiments on bulk samples where the nanotubes had a strong effect on G‘ of the polymer and only a negligible effect on G‘ ‘. |
| Databáze: | OpenAIRE |
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