POLYMERIZATION UNDER MAGNETIC-FIELD (PART 7) - SYNTHESIS AND CHARACTERIZATION OF A LIQUID-CRYSTAL POLYMER

A lyotropic liquid crystal (LC) poly(amide hydrazide) was synthesized from a diamine, N,N'bis(4-aminobenzoyl) hydrazine (BABH) and terephtha loyl chloride (TC) in presence and absence of magnetic field (MF) of 4 kg. The polymer prepared with and without MF was characterized by vis cosity and density measurements, IR spectroscopy, X-ray diffractometry , and TGA and DSC analysis. The polymer prepared under MF was of highe r inherent viscosity. The molecular weight (MW) of the polymer determi ned by IR spectroscopy was also higher when prepared under MF. The pol ymer prepared under MF was more thermostable than that obtained withou t MF.