series of thennotropic liquid Crystalline poly (estep-imide) s derived from1
6-hexanediamine
1
10-deanediamine and p-phenylenebis- (trimilitic ) dianhydidewas synthesize via a soluhon Polycondensation prare.The Poly (ester-imide)swere characterized by IR
DSC measurements
Polarizing microscopy and WAXDmeasurements.The DSC measurements revealed that the poly (ester-imide) poa sharp endothenn (Tm1) and a second endotherm (Tm2) which indicates thetransition from anisotropic to isotropic melt. Under polarizing microscope it was observed that samples
which were quenched inliquid nitrogen in the temperature range between Tm1 and Tm2
show a tipical birefringent pattern
WAXD measurements of the solid materials indicated nearly perfectly layered structure of the supermolecules.