7 Result(s)
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Chapter
Phase Behavior of High- and Low-Molar-Mass Liquid Crystal Mixtures
Over the past twenty years a rough estimate of the literature related to the physics and chemistry of liquid crystalline mixtures amounts to 5000 references! Our purpose is thus neither to present an exhaustiv...
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Chapter
How the Smectic a Phase Adapts to two Incommensurate Periods in Asymmetric Liquid Crystalline Systems
Asymmetric polar rod-like mesogens induce antiferroelectric associations which play a special role in the structure of layered liquid crystalline phases introducing a second period most often incommensurate wi...
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Chapter and Conference Paper
X-Ray Investigations of the Smectic A1 — Smectic A2 Transition
The existence in a binary system constituted of a three phenyl ring cyano compound mixed with TBBA (p=latm) of a smectic A-smectic A transition line has been reported [1]. By microscopic observation, it is imp...
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Chapter and Conference Paper
Influence of a Smectic Phase on Thermodynamical Behaviour of the Nematic to Isotropic Phase Transition
From an experimental point of view it does not seem to exist a straightforward relationship between the transition entropy ΔSNI and the orientational order parameter discontinuity ΔηNI at the nematic-isotropic tr...
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Chapter and Conference Paper
Occurrence of Reentrant Nematic and Reentrant Smectic A Phases in Some Liquid Crystal Series
The first pure compound exhibiting at atmospheric pressure a stable reentrant nematic but also a reentrant smectic A phase was discovered a few months ago [1]. The nature of these phases was confirmed in parti...
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Chapter and Conference Paper
X-Ray Studies of Reentrant Nematic and Smectic A Phases in Pure Compounds at Atmospheric Pressure
In the 4-N-alkyloxybenzoyloxy-4′-cyanostiLbenes series for the n=8 compound has been reported the evidence of the original tetramorphism (1):
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Chapter and Conference Paper
X-Ray Investigations and Magnetic Field Effects on a Fluid Mesophase of Disk-Like Molecules
The X-ray diffraction patterns of the fluid phase of two alkoxy benzoates of triphenylene have been investigated: for non oriented sample, this pattern is very similar to the isotropic liquid one, since we observ...
