Highly Selective Selective Polymerization of 1,3-Conjugated Dienes by Rare Earth Organometallic Complexes
writer：Wang, ZC；Liu, DT；Cui, DM
keywords：Organometallic complexes,Butadiene,Isoprene,Selective polymerization
source：期刊
Issue time：2015年
It
is an essential subject for coordination polymerization to achieve highly
selective polymerization of conjugated dienes. As an emerging kind of homogeneous
catalyst, rare-earth metal complexes bearing metallocene or multidentate
non-metallocene ligands have become gradually attractive over the past ten
years and more. The major emphasis of this review will be these rare-earth
metal complexes and the effect of various conditions on the selectivity and
activity of polymerization, including the Lewis acidity and ionic radii of
central metal, the geometry of ligand, the temperature of polymerization, the
species of co-catalyst and solvent. Moreover, the study of active species which
initiate the polymerization is particularly concerned. By generalizing the
relationship between the factor and the mechanism of polymerization, it is
hoped to give an inspiration to catalyst designer and the researchers of coordinate
polymerization.