Phase Diagrams and Thermophysical Properties of Polysiloxane and E7 Systems
| Autor: | N. Gogibus, Farida Benmouna, Bernd Ewen, Xavier Coqueret, Tadeusz Pakula, Ulrich Maschke, Mustapha Benmouna |
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| Rok vydání: | 2004 |
| Předmět: |
Chromatography
Materials science Isotropy Thermodynamics General Chemistry Condensed Matter Physics law.invention Condensed Matter::Soft Condensed Matter Differential scanning calorimetry Optical microscope law Liquid crystal Molecule General Materials Science Glass transition Phase diagram Eutectic system |
| Zdroj: | Molecular Crystals and Liquid Crystals. 411:545-551 |
| ISSN: | 1563-5287 1542-1406 |
| DOI: | 10.1080/15421400490436467 |
| Popis: | Phase diagrams of various polysiloxanes and the eutectic liquid cristalline mixture of cyanoparaphenylenes E7 are established. Thermophysical properties are investigated considering the case of Poly(dimethylsiloxane) and Poly(methylphenylsiloxane) with different molecular weights. Differential Scanning Calorimetry and Polarized Optical Microscopy are used to construct the phase diagrams and obtain thermophysical data that are rationalized using a combination of the Flory-Huggins theory of isotropic mixing and the Maier-Saupe theory of nematic order. The glass transition temperature versus composition of the blends investigated yields information of the plasticising effect of the small liquid crystal molecules. |
| Databáze: | OpenAIRE |
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