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6615556 
Journal Article 
Synthesis of syndiotactic polystyrene with novel titanocene catalysts activated by modified methylaluminoxane 
Zhu, PM; Wang, QF; Fang, YT; Lin, SA; , 
1999 
1 
Chinese Chemical Letters
ISSN: 1001-8417
EISSN: 1878-5964 
CHINESE CHEMICAL SOCIETY 
BEIJING 
10 
2 
171-174 
English 
WOS:000081029500031 
Novel highly active eta(5)-pentamethylcyclopentadienyltribenzyloxy titanium catalyst activated by modified methylaluminoxane (m-MAO) was prepared for styrene syndiospecific polymerization. The influences of the contents of trimethylaluminum (TMA) in m-MAO and external addition of tri-isobutylaluminum (TIBA) on the distribution of the oxidation states of titanium were investigated in detail. The Ti (III) is in favour of styrene syndiospecific polymerization in higher catalytic activity. 
Metallocene; Methylaluminoxane; Syndiotactic polystyrene