Design and self-assembling behaviour of comb-like stereoregular cyclolinear methylsiloxane copolymers with chiral lactate groups
| Autor: | N. N. Makarova, M. A. Shcherbina, Irina M. Petrova, Alexej Bubnov, Damian Pochiecha, Aleksej Gaj |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
010405 organic chemistry Mesogen 02 engineering and technology General Chemistry Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Crystallography Differential scanning calorimetry Optical microscope law Liquid crystal Copolymer General Materials Science 0210 nano-technology Pendant group Macromolecule |
| Zdroj: | Liquid Crystals. 46:25-36 |
| ISSN: | 1366-5855 0267-8292 |
| Popis: | Several new comb-like stereoregular cyclolinear methylsiloxane copolymers exhibiting the self-assembling behaviour have been designed and studied. For the resulting macromolecular materials, the chiral mesogenic unit, namely (S)-(–)-4-[1-ethoxycarbonyl)ethoxycarbonyl]phenyl-4′-[11-tetramethyldisiloxyl)-undecenyloxy)-biphenyl-4′-carboxylate, has been used as a side group to assure the mesomorphic behaviour. The mesomorphic and structural properties were studied by the polarising optical microscopy, differential scanning calorimetry and small-/wide-angle X-ray diffraction techniques. The designed copolymers form the orthogonal smectic A* and the tilted smectic C* phases over relatively broad temperature range, down to room temperatures. The obtained results are discussed in order to contribute to better understanding of the molecular architecture–nano-organisation relationship for a specific type of macromolecular system based on the lactic acid derivatives used as a flexible side groups. |
| Databáze: | OpenAIRE |
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