Synthesis and Characterization of Novel Polyesterimide Containing Naphthalene Moiety

Abstract

A new thermally stable polyesterimide was synthesized by the polycondensation of Bisphenol-A and tetrimide- diacid chloride. The tetrimide- diacid chloride was synthesized by heating the monomer bis (4-amino-3.5-dimethyl phenyl) 4ʹmethoxy naphthyl methane with pyromellitic dianhydride and p-amino benzoic acid followed by refluxing with thionyl chloride. The synthesized polymer was characterized by elemental analysis, FT-IR and ¹H-NMR spectroscopy. The properties of the polyesterimide such as thermal stability, inherent viscosity and solubility were also studied. Furthermore the crystallinity of the polymer was evaluated by means of X-ray diffraction patterns. The novel PEI exhibits high thermal stability, good solubility and processability.