Preparation ,Characterization and Thermal Properties of New Aromatic Polyester Based on Di ,Tri and Tetra Hydroxyl Monomers with 4,4Azo Di Benzoic Acid and Adipic Acid

Abstract

A series of new aromatic Polyesters were  synthesized by  polycondensation of various aromatic monomers  di ,tri and tetra diols (BCAHPMNM , BHPMB, BHPPB , BPBHP) with Acids(4,4Azo Di benzoic acid  and Adipic acid) using  dibutyltine dilaurate as Catalyst .all polyesters(P.E1-P.E4)containing pyridine heterocyclic group, aliphatic methylene linkage, and Azo group. The yield of Polyesters varies from 60-85%. All of  these  new  aromatic polyester  show very good  solubility in common organic  solvents , such as (pyridine , CHCl3 ,  CH2Cl2 , NaOH , H₂SO₄ , HNO₃ , Acetone , Benzene ,  DMF , DMSO , THF) without need for heating. Thermal analysis of polyesters by thermo gravimetric analysis (TGA) reveals that these Aromatic polyesters possess thermal stability. Monomers and polyesters characterized by FT-IRand¹HNMRspectrosticcopy.

Keywords: Aromatic polyester , 4,4Azo Di benzoic acid  , Adipic acid,  dibutyltine dilaurate.