Polymerization of methylmethacrylate by tridentate schiff base derivative of indenyl and cyclooctatetraenyl lanthanoid complexes along with Al(i-Bu) 3 catalytic system

Different types of the tridentate schiff base,[n-(2-methoxyphenyl) salicylideneamine] derivative of lanthanoid complexes along with al(i-bu) 3 are proved to be versatile tools for the polymerization of methylmethacrylate (mma). the complexes,derived from indene and tridentate schiff base ligands,express better efficiency (mv = 195 × 103-355×103) than the complexes,prepared from cyclooctatetraene (cot) and tridentate schiff base ligands (mv=105 × 103-175 × 103). the effect of catalyst,temperature,catalyst/mma molar ratio and catalyst/al(i-bu)3 molar ratio on the polymerization of mma at 70 °c are studied. it is observed that ligand size and radius of the metal are important factors in determining the catalytic efficiency of the complexes.