Structure – LC Properties Relationship in Siloxane–Azomethine Compounds

Abstract

Siloxane-azomethine liquid crystal (LC) dimmers and polymers of different mesogenic structure are compared from the standpoint of thermotropic LC behavior. Structure-properties relationships are discussed based on polarized light optical microscopy (PLM) observations, differential scanning calorimetry (DSC), thermo-optical analyses (TOA), and theoretical calculations of mesogenic index, molecular polarizability, and axial ratio.

Keywords:

• Siloxane
• Azomethine
• Liquid crystals
• Mesogenic Index
• Molecular polarizability

Notes

^a As observed under the polarizing light microscopy.

^b Mesogenic index, calculated as described in reference[ ¹⁷ ].

^c Molecular polarizability, calculated based on reference[ ¹⁸ ].

^d Axial ratio, estimated from molecular models[ ¹⁹ ].