Heterocyclic Liquid Crystal Materials: Synthesis and Characterization of Some Novel Heterocyclic Liquid Crystalline Compounds and Polymers - Couverture souple

Rouil, Ivan H.; Tomma, Jumbad H.; Al-Dujaili, Ammar H.

Couverture souple

ISBN 10 : 3843373191 ISBN 13 : 9783843373197

Editeur : LAP LAMBERT Academic Publishing, 2012

Synopsis

In this work synthesis and characterization of a novel series of compounds, polymers containing 1,3,4-thiadiazole and 1,2,4-triazole units are described. All of these materials in this study are characterized by FTIR, 1HNMR, 13CNMR, Mass and UV spectroscopy. The liquid crystalline properties of the prepared compounds were verified using differential scanning calorimeter (DSC) and hot-stage optical polarizing microscopy (OPM). The first series of this study containing two 1,3,4-thiadiazole Schiff bases rings connected with two terminal alkoxyphenyl rings. These compounds exhibited eneantiotripic nematic and smectic phases while other compounds did not exist any liquid crystalline behaviours. To comparison the liquid crystalline behaviour of these compounds, the two series having the azoxy groups instead of azomethine groups was synthesized. The difference between the azomethine compounds with that of azoxy group, The latter compounds did not show any liquid crystalline properties. Polyesters and polyethers were also prepared and found that all polymers did not show liquid crystalline properties but simply go to the glass transition temperatures Tg and then to isotropic melt.

Détails de l'édition

• Éditeur: LAP LAMBERT Academic Publishing
• Date d'édition: 2012
• Langue: anglais
• ISBN 10: 3843373191
• ISBN 13: 9783843373197
• Reliure: Broché
• Nombre de pages: 156
• Coordonnées du fabricant: non disponible
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