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Journal Article

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

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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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https://www.tandfonline.com/doi/abs/10.1080/00268948708082994?needAccess=true#aHR0cHM6Ly93d3cudGFuZGZvbmxpbmUuY29tL2RvaS9wZGYvMTAuMTA4MC8wMDI2ODk0ODcwODA4Mjk5ND9uZWVkQWNjZXNzPXRydWVAQEAw
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https://doi.org/10.1080/00268948708082994
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Citation

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.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-AEA3-0
Abstract
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.