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Active species in the anionic ring-opening polymerization of cyclic carbonates

Steffen Kühling, Helmut Keul, Hartwig Höcker

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Abstract

Anionic ring opening polymerization of 5,5-dimethyl-1,3-dioxan-2-one (2,2-dimethyltrimethylene carbonate) (1) initiated by sec-butyllithium, sodium methoxide or potassium dihydronaphthylide was found to proceed via alcoholate anions. This finding is based on 31P NMR spectroscopic studies of the polymer end groups, which result from the reaction of the living polymer with diphenyl chlorophosphate.

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What this paper is about

Anionic ring opening polymerization of 5,5-dimethyl-1,3-dioxan-2-one (2,2-dimethyltrimethylene carbonate) (1) initiated by sec-butyllithium, sodium methoxide or potassium dihydronaphthylide was found to proceed via alcoholate anions. This finding is based on 31P NMR spectroscopic studies of the polymer end groups, which result from the reaction of the living polymer with diphenyl chlorophosphate.

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Available abstract

Anionic ring opening polymerization of 5,5-dimethyl-1,3-dioxan-2-one (2,2-dimethyltrimethylene carbonate) (1) initiated by sec-butyllithium, sodium methoxide or potassium dihydronaphthylide was found to proceed via alcoholate anions. This finding is based on 31P NMR spectroscopic studies of the polymer end groups, which result from the reaction of the living polymer with diphenyl chlorophosphate.

Key concepts: Living anionic polymerization, Sodium methoxide, Polymerization, Anionic addition polymerization, Butyllithium, Chemistry, Ring-opening polymerization, Polymer chemistry

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