"Research progress in polymerization of conjugated dienes catalysized by cobalt based catalysts"

Abstract

The development of cobalt based catalysts in the field of conjugated diene polymerization was reviewed. The catalytic activity of using different types of cobalt catalytic systems and cobalt complexes containing different types of ligands for the polymerization of conjugated dienes such as butadiene and isoprene, as well as the effect on the microstructure of polymers (regional regularity, cis-1,4 -unit, trans-1,4-unit, 1,2-unit, and 3,4-unit) and their stereoregularity (inter regularity, iso regularity, microstructure sequence distribution) were explored in detail with 76 references. The influence of polymer molecular weight and its distribution were also reviewed, and the research direction of cobalt catalysts in catalysizing the polymerization of conjugated dienes was prospected.

Keywords

• cobalt based catalyst，butadiene， isoprene，ligand， catalytic activity， selective polymerization， mechanism; review，