P. Longo et al., Polymerization of styrene and conjugated diolefins in the presence of nickelocenes-based catalysts, MACRO CH P, 200(11), 1999, pp. 2461-2466
Several nickelocenes activated by methylaluminoxane have been investigated
in the polymerization of styrene obtaining isotactic polystyrene. The most
stereospecific system is Cp2Ni-MAO, which is also able to polymerize some c
onjugated diolefins producing polymers with 1,4 structure.