A NEW RIGID RODLIKE COLORED POLY(AMIDE HYDRAZIDE) - THERMAL, OPTICAL ANISOTROPIC, AND MECHANICAL-BEHAVIOR

A new aromatic all-para oriented poly( amide hydrazide) containing an azo group in the main chain was prepared by reacting a symmetric diami ne containing a preformed hydrazide group, viz., N,N'-bis(4-aminobenzo yl)hydrazine (BABH), with 4,4'-azobenzoyl chloride (ADBC). The thermal behavior of the polymer was studied by TGA and DSC in air and nitroge n. Films of the polymer were prepared by two processes, viz., wet and dry processes, by using its solution in DMAc containing LiCl. The opti cal anisotropy, surface morphology, and tensile properties of the film s were studied. (C) 1997 John Wiley & Sons, Inc.