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Stereoregular emulsion polymerization of butadiene

✍ Scribed by Hisao Ono; Tadaya Kato

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
184 KB
Volume
38
Category
Article
ISSN
0887-624X

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✦ Synopsis

water is usually recognized as a strong inhibitor of transition-metal polymerization. By analyzing the addition order effect of the ingredients, we show that the reduction of cobalt in the presence of butadiene is necessary for the polymerization. Radical-polymerization inhibitors such as phenols did not terminate the polymerization reaction, but sulfur did. Moreover, the valence of the reduced cobalt butadiene complex catalyst is considered zero. The zero-valent cobalt is classified as a soft acceptor, butadiene is a soft donor, and water is a hard acceptor. In this article, we discuss the reason butadiene could be polymerized stereoregularly by an emulsion system.

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