Chain Conformation in Polymer Nanocomposites with Uniformly Dispersed Nanoparticles
| Autor: | Michael Crawford, Lilin He, Yuri B. Melnichenko, G Cohen, Boualem Hammouda, Sanat K. Kumar, Robert J. Smalley, B Hogan, William Guise, Barbara A. Wood |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymer nanocomposite Scattering Molecular Conformation General Physics and Astronomy Nanoparticle Polymer Neutron scattering Silicon Dioxide Nanocomposites Neutron Diffraction chemistry.chemical_compound Microscopy Electron Transmission X-Ray Diffraction chemistry Chemical engineering Scattering Small Angle Nanoparticles Polystyrenes Polymer blend Polystyrene Dispersion (chemistry) |
| Zdroj: | Physical Review Letters. 110 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.110.196001 |
| Popis: | The effect of nanoparticles (NP) on chain dimensions in polymer melts has been the source of considerable theoretical and experimental controversy. We exploit our ability to ensure a spatially uniform dispersion of 13 nm silica NPs miscible in polystyrene melts, together with neutron scattering, x-ray scattering, and transmission electron microscopy, to show that there is no measurable change in the polymer size in miscible mixtures, regardless of the relative sizes of the chains and the nanoparticles, and for NP loadings as high as 32.7 vol%. Our results provide a firm basis from which to understand the properties of polymer nanocomposites. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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