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Título: Phase characterization of LC (meth)acrylic monomers based on omega-hexyloxy- and omega-undecyloxy-salicylaldimine groups with different alkoxy tail substitutions
Autores: Soto Bustamante, Eduardo Arturo
González Henríquez, Carmen M.
Rodríguez Lehyt, G. A.
Vergara Toloza, R. O.
Fecha: 2009-09-21
2009-09-21
2004-08
Publicador: TAYLOR & FRANCIS LTD
Fuente: Ver documento
Tipo: Artículo de Revista
Tema: Omega-hexyloxy
Omega-undecyloxy-salicylaldimine groups
LIQUID-CRYSTAL POLYMERS
X-RAY
Descripción: The synthesis and phase characterization of three homologous series of liquid crystalline acrylic and methacrylic monomers, consisting of 21 new compounds are presented. They are based on omega-hexyloxy- and omega-undecyloxysalicylaldimine groups with different alkoxy tail substitutions. The liquid crystalline materials were characterized by polarizing optical microscopy and differential thermal analysis. Smectic A and tilted smectic C phases were observed in the compounds. Near the transition to the isotropic, a narrow nematic phase, coexisting with the smectic A phase, was detected for the pentyloxy and hexyloxy derivatives in the M11 and A11 series. In case of M11R11 and M11R12 only a tilted smectic C phase was detected. The clearing point was comparable for all series, around 100degreesC.
Idioma: Inglés
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