M. Murata et al., SYNTHESIS OF A TELECHELIC POLYPROPYLENE WITH A VANADIUM-BASED LIVING POLYMERIZATION CATALYST, Macromolecular rapid communications, 19(5), 1998, pp. 267-270
The V(acac)(3) (acac = acetylacetonato)/ALEt(2)Cl catalyst is known to
promote the living polymerization of propylene at low temperature. In
the present study, the catalyst was modified by contacting with a,ome
ga-unconjugated diene compounds, and the resulting catalyst was applie
d to propylene polymerization. The polymer produced shows a bimodal mo
lar mass distribution, where the molecular weight of the higher molecu
lar weight portion is twice that of the lower molecular weight portion
. By using the CO quenching technique, it was found that the polymer w
ith the higher molecular weight has a telechelic structure.