Mesogenic Polymers with Heterocyclic Moiety: I Polyesters

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Abstract
Eight polymers were synthesised by condensing acid chloride of 2,4-bis(4'-carboxyphenoxy)-6-chlorotriazine with different dihydroxy compounds. The polyesters obtained exhibited both nematic and smectic mesophases. The polymers were characterized by elemental analysis and IR spectra. The model compound was also synthesised to correlate the mesogenic properties of polymers with the monomer structure. Even though dihydroxy aromatic monomers like bisphenol-A, phenolphthalein and 1, 4-dihydroxy anthraquinone were used the polymer still exhibited mesogenic properties. This is very interesting because the acid monomer, which is symmetrically substituted and has a flexible ether linkage, would not normally be conductive to mesomophism in polymers with such broad molecules. An attempt has been made to correlate structural aspects with mesogenic properties of polymers.

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