Artículos de revistas
Phase characterization of two homologous series of LC methacrylic monomers based on omega-hexyl- and omega-butyl-oxysalicylaldimine groups with different alkoxy tail substitutions
Fecha
2003-01Registro en:
LIQUID CRYSTALS 30(1): 17-22
0267-8292
Autor
Soto Bustamante, Eduardo
Saldaño Hurtado, Danilo
Vergara Toloza, Rafael Orlando
Navarrete Encina, Patricio
Athanassopoulou, M. A.
Institución
Resumen
The phase characterization of two homologous series of liquid crystalline methacrylic monomers based on omega-hexyl- and omega-butyloxysalicylaldimine groups, with different alkoxy tails, is presented. The liquid crystalline materials were characterized by polarising optical microscopy. differential scanning calorimetry, differential thermal analysis, and X-ray diffraction. All the monomers exhibit the simultaneous occurrence of smectic A and C phases, When the alkyl chain is short narrow nematic phase is observed, leading to an I-N-SmA-SmC phase sequence.