Abstract
Cyclic carbonates are accessible by reaction of diols with carbonic acid esters. With anionic initiators they can be polymerized under mild conditions to result in high molecular weight polymers. Under suitable conditions, a ring-chain equilibrium is established, i.e., beside acyclic polymers a homologous series of cyclic oligomers is obtained. The different cyclic carbonates discussed open a variety of secondary reactions, in particular cross-linking. Following the anionic mechanism, cyclic carbonates are suitable monomers for the preparation of blockcopolymers. Polystyrene-block-poly (2,2-dimethyltrimethylene carbonate) and multiblockcopolymers of 2,2-dimethyltrimethylene carbonate and e-caprolactone were prepared.
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