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Liquid Crystals Volume 41, 2014 - Issue 7
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Original Articles

Reentrant nematic phase in 4-alkyl-4′-cyanobiphenyl (nCB) binary mixtures

Shuhei FujimuraDepartment of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki305-8571, Japan
,
Yasuhisa YamamuraDepartment of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki305-8571, Japan
,
Mafumi HishidaDepartment of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki305-8571, Japan
,
Shigenori NagatomoDepartment of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki305-8571, Japan
&
Kazuya SaitoDepartment of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki305-8571, JapanCorrespondence[email protected]
Pages 927-932 | Received 14 Jan 2014, Accepted 04 Feb 2014, Published online: 28 Feb 2014
 
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Abstract

The appearance of reentrant nematic phase was identified in nCB/8CB (n = 1–6) binary mixtures using differential scanning calorimetry, small-angle X-ray diffraction and polarising microscopy with photomonitor. Phase diagrams can roughly be unified if plotted against the average number of alkyl chain length. Distinction was recognised for the phase boundaries between nematic and smectic A phases of even and odd n of the minor component nCB. The character of 8CB as ‘SmA former’ is briefly discussed.

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