Influence of antimony catalysts with hydroxyethoxy ligands on polyester polymerization

Abstract

Abstract The effectiveness of antimony polymerization catalysts for polyester, with varying numbers of hydroxyethoxy ligands on antimony, was studied. The ligand number, ranked in decreasing effectiveness was 5 = 3 > 2 > 1 ≫ 0. Results for this series of compounds are consistent with a mechanism in which antimony bonds with polyester chain ends to catalyze intermolecular condensation.