Abstract

A new set of two thermotropic liquid crystalline  random copolyesters were generated by utilizing 4,4’-oxybis(benzoic acid), 2,6-napthalene dicarboxylic acid with  a common diol, namely, 2,7-bis(4-hydroxy-3-methoxybenylidene)cycloheptanone and  hydroquinone bis(2-hydroxyethyl)ether by direct polycondensation in dry pyridine solvent  with diphenylchlorophosphate (DPCP) as the condensation agent. These copolyesters had inherent viscosity values of 1.15 dl/g and1.65 dl/g. The structural aspects were resolved by making use of FT-IR, ¹H and ¹³C NMR spectroscopy. Differential scanning calorimetry was involved in deducing the thermal transition behavior of the copolyester. Composite nanofibers were produced by electrospinning by blending the copolyester PNVH with polyvinylchloride (PVC) in tetrahydrafuran (THF) and then with PVC and nanoclay in THF. The surface morphology of the polymer composite nanofibers was investigated by scanning electron microscopy (SEM). These composite nanofibers may emerge as suitable materials for drug delivery system.

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