LINEAR POLYESTERS CONTAINING ISOCYANURATE RINGS

Two series of linear polyesters containing isocyanurate rings have been prepared to determine the effect of structural variations on thermal and solubility properties. The polyesters were prepared by the polycondensation reaction of isocyanurate containing difunctional acid and ester monomers with linear diols. The substituent on the isocyanurate ring and the length of the acid side chain have been shown to have considerable effect on the glass transition temperature T//g. Different solubility properties were observed for the series of polyesters in which the pendant substituent was - C//6H//5 and the acid side chain was - CH//2CO//2H. These polymers were insoluble in THF (tetrahydrofuran), and the polyester prepared from 1,6-hexanediol was also insoluble in chloroform. TGA indicated that structural differences had no significant effect on the thermal stability of these linear polyesters.