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High resolution X-ray measurements of the nematic-smectic C phase transition in the polymeric liquid crystal C-6 polysiloxane

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons128263

Zimmermann,  Herbert
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society;
Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Zitation

Nachaliel, E., Keller, E. N., Davidov, D., Zimmermann, H., & Deutsch, M. (1987). High resolution X-ray measurements of the nematic-smectic C phase transition in the polymeric liquid crystal C-6 polysiloxane. Molecular Crystals and Liquid Crystals, 149(1), 393-399. doi:10.1080/00268948708082994.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0019-AEA3-0
Zusammenfassung
We report on high-resolution X-ray measurements of the nematic to smectic C phase transition in the polymeric liquid crystal, C-6 polysiloxane. Preliminary results show that smectic fluctuations measured in the nematic phase are roughly consistent with a Chen and Lubensky type of theory, as was developed for monomeric liquid crystals. The phase transition in C-6 polysiloxane shows pre-transitional smectic fluctuations at least 30°C above the phase transition temperature, TNC, where TNC = 37.84 ± 0.05°C. At TNC, there is a weak first order phase transition to the smectic C phase.