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Polymerization of butadiene with Co(acac) 3 –( i ‐Bu) 3 Al–H 2 O catalyst
Author(s) -
Yang W. L.,
Hsu C. C.
Publication year - 1983
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1983.070280113
Subject(s) - polymerization , catalysis , monomer , chain transfer , polymer chemistry , toluene , polymer , solution polymerization , living polymerization , chemistry , 1,3 butadiene , alkyl , materials science , radical polymerization , organic chemistry
The polymerization of butadiene in toluene using Co(acac) 3 –( i ‐Bu) 3 Al–H 2 O catalyst system was studied. Presented are the effects of the addition order, aging time, and composition of catalysts on rates, polymer microstructure, and molecular weights. The polymerization was found to be initiated by the Co(acac) 3 ‐hydrolized aluminum alkyl complex. The chain propagation proceeds according to a first‐order reaction with respect to monomer and active species and is a strong function of Al/H 2 O with an optimum ratio of 1.0, but independent of Al/Co. The nature of polymerization seems to change as Al/H 2 O increases from less than 1 to greater than 1. Transfer reaction is significant. From the kinetic data it was found that the termination reaction is most likely to be by combination.