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Initiation and propagation reactions in the copolymerization of epoxide with carbon dioxide by catalysts based on diethylzinc and polyhydric phenol
Author(s) -
Kuran Witold,
Listoś Tomasz
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950314
Subject(s) - diethylzinc , cyclohexene oxide , chemistry , epoxide , copolymer , phenol , catalysis , propylene oxide , polymer chemistry , cyclohexane , organic chemistry , ethylene oxide , polymer , enantioselective synthesis
Propylene oxide and cyclohexene oxide were copolymerized with carbon dioxide in the presence of catalysts such as diethylzinc with phenol or 1‐phenoxy‐2‐propanol and/or a polyhydric phenol (polyhydroxybenzene derivatives such as 4‐ tert ‐butylcatechol, pyrogallol): The corresponding copolymers with predominant carbonate linkages and the respective cyclic alkylene carbonates as by‐products were obtained in the presence of catalysts derived from diethylzinc and polyhydric phenol. Cyclic alkylene carbonates but no polymeric products were formed in the presence of catalysts derived from diethylzinc and monoprotic compound. The copolymers were analysed by means of 1 H‐ and 13 C nuclear magnetic resonance (NMR) spectroscopy in terms of chain microstructure and end groups. Alkaline hydrolysis of the cyclohexene oxide/carbon dioxide copolymer was performed and the trans‐structure of the obtained cyclohexane‐1,2‐diol was determined. Mechanisms for the initiation and propagation reactions are proposed and discussed.