Copolymerization of styrene and butadiene with nickel compounds-methylaluminoxane catalysts

Synthesis of high molecular weight copolymer of styrene and butadiene bearing high 1,4‐cis butadiene unit from copolymerization with CpTiCl3/methylaluminoxane catalyst

“…With the addition of CA to the CpTiCl 3 /MAO catalyst, the 1,4‐ cis content of Bd in the copolymer was somewhat increased, but the St contents in the copolymer were somewhat decreased. This is in contrast to the reported results that CA did not influence the copolymer structure in the copolymerization of St and Bd with the Cp 2 Ni/MAO catalyst 16…”

“…This is in contrast to the reported results that CA did not influence the copolymer structure in the copolymerization of St and Bd with the Cp 2 Ni/MAO catalyst. 16 In the polymerization of Bd with Co(octanoate) 2 / MAO catalyst, the effect of organic chlorides such as tert-butyl chloride on the polymer yield, stereoregularity, and molecular weight of the polymer were observed. 25 An increase of the molecular weight of the polymer and polymer yield were explained by the stability of the active sites for the polymerization.…”

“…The copolymerization of St and Bd was also investigated with lanthanide‐based catalysts,6–11 metallocene catalysts,12, 13 and nonmetallocene transition metal catalysts 14–16. The products obtained from copolymerization with these catalysts mainly consisted of 1,4‐ cis units in the copolymer.…”