Polymerization of butadiene with a halogen-containing trans-regulating neodymium-magnesium catalytic system in the presence of carbon tetrachloride

The polymerization of butadiene in toluene initiated by the NdCl3 · 3TBP-Mg(C4H9)(i-C8H17) (TBP is tributyl phosphate) catalytic system has been studied. It has been shown that the polymerization reaction under study is a nonstationary slowly initiated process. The addition of carbon tetrachloride promotes an increase in the catalytic activity of the system. The products of polymerization have low molecular masses and polydispersity indexes. The content of 1,4-trans-units in the polymer is as high as 95%.