Polystyrene nanocomposites based on carbazole-containing surfactants
| Autor: | David D. Jiang, Grace Chigwada, Charles A. Wilkie |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Thermogravimetric analysis Materials science Bulk polymerization Carbazole Polymer Condensed Matter Physics complex mixtures chemistry.chemical_compound chemistry Thermal stability Polystyrene Physical and Theoretical Chemistry Composite material Dispersion (chemistry) Instrumentation Alkyl |
| Zdroj: | Thermochimica Acta. 436:113-121 |
| ISSN: | 0040-6031 |
| DOI: | 10.1016/j.tca.2005.02.033 |
| Popis: | New organically-modified clays containing a carbazole unit were prepared and the number of long alkyl chains on the surfactant was varied. The clay was used to prepare polystyrene nanocomposites by both bulk polymerization and melt blending. The dispersion of these clays in the polymer matrix was evaluated using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The thermal stability of the clays and the nanocomposites were analyzed by thermogravimetric analysis (TGA) while the fire properties were evaluated by cone calorimetry. If more than two alkyl chains were present, the gallery spacing is apparently overcrowded, leading to poor dispersion. Bulk polymerization gave nanocomposites with better dispersion and reduced flammability when compared to the melt blending process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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