Propylene Oxide Polymerization Using the Diphenylzinc--Acetone System in Benzene at 60 deg C

The diphenylzinc--acetone system was used as a catalyst for propylene oxide polymerization in benzene solution at 60 deg C. This system, as well as the diphenylzinc--water system, is greatly influenced by the molar ratio of acetone to diphenylzinc and the maximum catalyst activity was found for a ra...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 1989-03, Vol.21 (3), p.287-291
Main Authors: Lopez, F, Calcagno, M P, Contreras, J M, Torrellas, Z, Rabagliati, F M
Format: Article
Language:English
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Summary:The diphenylzinc--acetone system was used as a catalyst for propylene oxide polymerization in benzene solution at 60 deg C. This system, as well as the diphenylzinc--water system, is greatly influenced by the molar ratio of acetone to diphenylzinc and the maximum catalyst activity was found for a ratio of unity. GPC results strongly suggest the presence of more than one active species for the system. exp 13 C NMR analysis indicates that the resulting poly(propylene oxide) has a head-to-tail arrangement. This system was not an effective catalyst for the styrene oxide polymerization. 14 ref.--AA
ISSN:0170-0839