Syndiospecific living polymerization of 4-methylstyrene with (trimethyl)pentamethylcyclopentadienyltitanium/tris(pentafluorophenyl)borane/trioctylaluminium catalytic system

✍ Scribed by Masanao Kawabe; Masahide Murata; Kazuo Soga

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 54 KB
• Volume: 20
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/(sici)1521-3927(19991101)20:11<569::aid-marc569>3.0.co;2-9

✦ Synopsis

The polymerization of 4-methylstyrene with the (trimethyl)pentamethylcyclopentadienyltitanium (Cp*TiMe 3 )/tris(pentafluorophenyl)borane (B(C 6 F 5 ) 3 )/trioctylaluminium (AlOct 3 ) catalytic system at -20 8C was carried out. The number-average molecular weight (M n ) of the polymers increased linearly with increasing monomer conversion. The propagating chain ends were successfully reacted with tert-butyl isocyanate, and the M n of the polymer determined by 1 H NMR was in good agreement with the M n determined by GPC measurement. It is concluded that this catalytic system promoted the syndiospecific living polymerization of 4-methylstyrene.