Synthesis and physico-chemical properties of aromatic polyesters containing S-triazine rings in the main chain

729-734Several polyesters have been synthesized by high temperature poly-condensation of 2-(β-naphthylamino)-4,6-bis(naphthoxy-3-carbonyl chloride)-S-triazine (NANCCT) with each of the aromatic diols: bisphenol-A (BPA), bisphenol-C(BPC), 1,5- and 1,7-dihydroxynaphthalene (DHN-1,5 and DHN-1,7), 1,4-dihydroxyanthraquinone (DHAQ-1,4), phenolphthalein (Ph), catechol (C), resorcinol (R) and hydroquinone (Hq) and characterized by solubility, density, viscosity measurement, IR spectra and thermogravimetric analysis. All the polyesters are amorphous and soluble at high temperature in acetone, dimethylformamide, dimethylsulphoxide, dimethylacetamide etc. The polymer has reduced viscosities in the range 0.509-0.740 dl g-1 in dimethylformamide at 30°C. The thermal stability of polyesters, based on various temperature characteristics, is found to decrease in the following order: PEDHN-1,5 > PEDHN-1,7 > PER> PEHQ=PEPh > PEBPC=PEC > PEBPA