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RESEARCH PRODUCT
De Vries smectic A phase formed by a liquid crystal side chain copolymer? A13C NMR study
Ralf StannariusLama NajiS. GrandeRudolf ZentelMartin Rösslesubject
Materials scienceContext (language use)General ChemistryCarbon-13 NMRCondensed Matter PhysicsNmr dataCondensed Matter::Soft Condensed MatterCrystallographyTilt (optics)Liquid crystalPhase (matter)CopolymerSide chainGeneral Materials Sciencedescription
We study the orientation and order parameter of a liquid crystalline random side chain copolymer by 13C NMR. Evidence has previously been presented that this material forms a de Vries smectic A phase. The NMR data show that the molecular tilt angle in the smectic A phase is very small or zero and the smectic A–smectic C* transition is attributed predominantly to a change of the molecular tilt rather than azimuthal ordering. We discuss the NMR results in the context of earlier X‐ray and elastic characterizations of structurally similar materials.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-10-01 | Liquid Crystals |