Abstract
A novel class of interesting polyurea derivatives 6 (a-c) and 7 (a-c) was synthesized using solution polycondensation technique by the interaction of 1 mole of bis (2-aminothiazol-4-ylbenzylidene)cycloalkanones monomers 3 (a,b) with one moles of diisocyanate compounds in pyridine. The model compounds 4 and 5 were synthesized by the interaction of one mole of monomers 3 (a) or 3 (b) with two moles of phenylisocyanate in pyridine and their structures were confirmed by correct elemental and spectral analyses. The resulting polymers were characterized by elemental and spectral analyses, beside solubility and viscometry measurements. X-ray analysis showed these polymers having high degree of crystallinity in the region 2 theta = 5-60(A degrees). In addition, the morphological properties of selected examples were tested by SEM, and the electrical properties of these polymers were measured. Moreover the corrosion inhibition behavior of diarylidenecycloalkanone monomers and selected examples of polyurea derivatives were carried out on steel in 0.5 M H(2)SO(4) at 40A degrees C giving cathodic, anodic and mixed inhibition.