Citation: ZHOU Deliang, ZHANG Dong, Samuel K.L. TAN, ZHOU Qifeng. SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES*[J]. Chinese Journal of Polymer Science, ;1997, 15(4): 353-361. shu

SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES*

Received Date: 2 April 1997

A series of novel mesogenic polyamides containing a flexible pendent side group wassynthesized by solution condensation polymerization. The new monomers, diacids and di-amines containing flexible elements of diferent lengths, were also synthesized and character-ized by ~1HNMR, mass spectroscopy and elemental analysis. The polymers were character-ized by viscosity measurements, differential scanning calorimetry (DSC), X-ray diffiactionand polarizing optical microscopy. These studies revealed that polyamides containing flexible elements of a sufficient length exhibited thermotropic liquid crystalline (LC) properties.The melting temperatures of this series of polymers were particularly sensitive to the length of the flexible segment on the main chain and that of the flexible pendent ester side chain.Lyotropic LC behaviours were also observed in solution.
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