Artículo de revista
Synthesis and characterisation of two homologous series of LC acrylic monomers based on phenolic and resorcinic azobenzene groups
Fecha
2016Registro en:
Liquid Crystals 43(12): 1804-1812
0267-8292
10.1080/02678292.2016.1209791
Autor
Romero Hasler, Patricio
Fierro Armijo, Andrés
Soto Bustamante, Eduardo
Meneses Franco, Ariel
Institución
Resumen
The synthesis and phase characterisation of two homologous series of monomers of acrylic azo-compounds has been presented. The characterisation comprises polarising optical microscopy (POM), differential scanning calorimetry (DSC) and powder X-ray diffractometry (PXRD). All studied monomers exhibit a narrow nematic phase with decrease in temperature range while increasing the alkoxy tail length. For the resorcinic azo benzenes at higher tail lengths, SmA and SmC phases are present. Phenolic azo compounds show only SmA phase. The resorcinic family showed more stable phases, with broader liquid crystalline temperature range than its phenolic equivalent