Abstract
AbstractThermal and mesogenic properties of semirigid polyamides composed of one benzene ring with a kinked linkage and various aliphatic chains in the repeating unit, which are derived from three 1,3‐diaminobenzenes and aliphatic dicarboxylic acids, were examined. Only two polyamides with a long aliphatic chain (C18H36), based on 4‐methyl‐ and 2,4,6‐trimethyl‐1,3‐diaminobenzenes, form mesophases although the polymers exert nontraditional mesogenic units. Formation of the mesophase in the latter case depends on the inherent viscosity, i.e., polymers with lower inherent viscosity (⩽1,47 dL/g) form a layered structure by intermolecular interaction via hydrogen bonding of the amide linkage.
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