Copolymerization of styrene by diphenylzinc-additive systems I.Copolymerization of styrene/p-tert-butylstyrene by Ph_2Zn-metallocene-MAO systems

摘要

Copolymerization of styrene (S) and p-tert-butylstyrene (p-Bu~tS) was carried out at 60 deg C using diphenylzinc-metallocene-MAO systems. Metallocnees bisindenylzirconium dichloride. bis(n-butylcyclopentadienyl)titanium dichloride and cyclopentadienyltitanium trichloride were tried, the latter giving the largest conversion. Copolymers obtained with this system were analyzed by NMR and sowed to be syndiotactic in nature and slightly richer in p-Bu~tS than the initial feed from which they were formed.