A series of novel low molecular weight organosiloxane compounds have been investigated using a number of techniques such as: texture, birefringence measurements and dielectric spectroscopy. Some materials under investigation are shown to have a direct transition to de Vries SmA* phase on cooling from the isotropic phase, whereas the others show first a transition from isotropic to orthogonal SmA*, followed by a transition from orthogonal SmA* to de Vries SmA* phase. We propose a phase diagram for a possible phase transition from SmA* to SmC* phase.
Autori interni: | |
Autori: | O. E. PANARINA; YU. P. PANARIN; F. ANTONELLI; J. K. VIJ; M. REIHMANN; GALLI G |
Titolo: | Investigation of de Vries SmA* mesophases in low molecular weight organosiloxane compounds |
Anno del prodotto: | 2006 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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