Journal
LIQUID CRYSTALS
Volume 31, Issue 4, Pages 593-599Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290410001667993
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We have measured the rheological properties of two cholesterol derivatives (cholesteryl myristate and cholesteryl nonanoate) in the vicinity of their cholesteric-smecticA transitions. The results for the two compounds differ qualitatively, and are in agreement with results based on optical observations of new defects in cholesteryl nonanoate showing that this material, traditionally considered as a typical cholesteric, in fact exhibits a TGBA phase between the cholesteric and smectic A phases.
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