Characterization of a Modified Polyvinylsilazane Preceramic Polymer
| Autor: | Samuel Frueh, Gavin Richards, Justin W. Reutenauer, Steven L. Suib, Timothy P. Coons |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Materials science Polymer Carbide Gel permeation chromatography chemistry.chemical_compound chemistry Attenuated total reflection visual_art Polymer chemistry Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Tetrahydrofuran Chlorosilane |
| Zdroj: | Journal of the American Ceramic Society. 95:3339-3345 |
| ISSN: | 0002-7820 |
| Popis: | This investigation focused on the synthesis and characterization of a modified polyvinylsilazane (PVSZ) polymer. Previously, our group synthesized the PVSZ polymer through the ammonolysis of vinyltrichlorosilane (VTS) in tetrahydrofuran (THF). This material showed promise as a precursor for silicon nitride–silicon carbide-based ceramic materials. Due to the structure of the PVSZ polymer, the ability to stabilize (shelf-life) and dope with metals and metalloids has proven to be difficult. To overcome these problems, a second chlorosilane precursor, dichloromethylsilane, was introduced into the ammonolysis reaction. This polymer proved to be more stable (>3 months before cross-linking) and added a potential doping site on the backbone of the polymer while maintaining ceramic yields greater than 80%. The polymethylvinylsilazane (PMVSZ) polymer was characterized using attenuated total reflectance (ATR) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and elemental analysis. The results indicated that the ratio of chlorosilane precursors used plays an important role in the composition of crystallized ceramic material. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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