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Novel Complex Catalyst of η 3 ‐(Pentamethylcyclopentadienyl)dimethylaluminum/Titanium(IV) Butoxide (Cp*AlMe 2 /Ti(OBu) 4 ) for Syndiotactic Polystyrene
Author(s) -
Chen YuPin,
Tsai JingCherng,
Hong JinLong
Publication year - 2003
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200300030
Subject(s) - chemistry , methylaluminoxane , polystyrene , tacticity , catalysis , metallocene , styrene , polymerization , titanium , polymer chemistry , organic chemistry , medicinal chemistry , copolymer , polymer
A novel metallocene catalyst was prepared from the reaction of (η 3 ‐pentamethylcyclopentadienyl)dimethylaluminum (Cp*AlMe 2 ) and titanium(IV) n ‐butoxide Ti(OBu) 4 . The resulting titanocene Cp*Ti(OBu) 3 was combined with methylaluminoxane (MAO)/tri‐iso‐butylaluminum (TIBA) to carry out the syndiotactic polymerization of styrene. The resulting syndiotactic polystyrene (sPS) possesses high syndiotacticity according to 13 C NMR. Catalytic activity and the molecular weight of the resulting sPSs were discussed in terms of reaction temperature, concentration of MAO, amounts of scavenger TIBA added, and the hydrogen pressure applied during polymerization.