DefinePK

Abstract

Some new polythiols were derived from aromatic aldehyde (2-hydroxy benzaldehyde) and different diamines (semicarbazide, 4-phenyl, 3-thiosemicarbazide, 4-4'-oxydianiline and N, N'- dimethyl p-phenylenediamine), in the presence of elemental sulphur.The process of condensation is carried out by the Willgerodt Kindler (WK) reaction of azomethine donor or derivatives with elemental sulphur in the presence of a strong base as a catalyst. The polythiols (polythioamides) were characterized by different techniques like elemental micro analysis, FTIR, UV- Vis spectroscopies, thermal analysis and viscosity measurement. The FT-IR showed the main band around 1235-1265/cm-1 because of the formation of thiol groups in respected polythiols to vC=S vibrations. The polythiols indicated improved thermal solidity up to 600 °C. These polythiols were soluable in highly polar organic solvents due to their complex structures. The intrinsic visco-metrical data of these polythiols reached about 0.393-0.5201 dL/g in THF.