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Syndiospecific living polymerization of 4‐methylstyrene with (trimethyl)pentamethylcyclopentadienyltitanium/tris(pentafluorophenyl)borane/trioctylaluminium catalytic system
Author(s) -
Kawabe Masanao,
Murata Masahide,
Soga Kazuo
Publication year - 1999
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19991101)20:11<569::aid-marc569>3.0.co;2-9
Subject(s) - polymerization , borane , polymer chemistry , monomer , isocyanate , catalysis , polymer , chemistry , living polymerization , solution polymerization , organic chemistry , radical polymerization , polyurethane
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°C 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.