Making Organic-Inorganic Nanocomposites via Selective Dispersion of PS-Tethered SiO2Particles in Polystyrene-Block-Polymethylmethacrylate Copolymer
| Autor: | Li-Ko Chiu, Raymond Chien-Chao Tsiang, Je-Yuan Yeh, Chia-Hong Liu |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Materials science Nanocomposite Article Subject Lipid microdomain Polymer chemistry.chemical_compound chemistry Chemical engineering lcsh:Technology (General) Polymer chemistry Copolymer lcsh:T1-995 General Materials Science Lamellar structure Polystyrene Particle size Dispersion (chemistry) |
| Zdroj: | Journal of Nanomaterials, Vol 2012 (2012) |
| ISSN: | 1687-4129 1687-4110 |
| DOI: | 10.1155/2012/327583 |
| Popis: | SiO2nanoparticles have been dispersed selectively in the polystyrene (PS) microdomain of polystyrene-block-polymethylmethacrylate (PS-b-PMMA) block copolymer via the blending of PS-b-PMMA with PS-tethered SiO2. As observed by atomic force microscopy and scanning electron microscopy, the incorporation of SiO2particles not only enlarges the PS microdomain but also reduces the surface energy of the PS microdomain and transforms the morphology from either lamellar layers or cylinders to islanded bicontinuous microstructures. Blending SiO2particles with an excessive amount or with a particle size larger than that of the PS microdomain would pose an extreme constraint on the molecular rearrangement, unstabliize the microdomain separation, and even make the microdomain separation unobservable. The nanosize and the uniform distribution of the PS microdomain in the PS-b-PMMA polymer have thus enabled us to achieve a uniform distribution of the inorganic SiO2particles in the organic polymeric matrix. |
| Databáze: | OpenAIRE |
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