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Polymerization of butadiene with Co(acac)3–(i-Bu)3Al–H2O catalyst

✍ Scribed by W. L. Yang; C. C. Hsu

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
692 KB
Volume
28
Category
Article
ISSN
0021-8995

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✦ Synopsis

The polymerization of butadiene in toluene using Co(acac)3-(i-Bu)3Al-H~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/H20 with an optimum ratio of 1.0, but independent of AWo. The nature of polymerization seems to change as Al/H20 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.

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