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Ring‐opening polymerization and copolymerization of cyclic carbonates with a variety of initiating systems
Author(s) -
Höcker H.,
Keul H.,
Kühling S.,
Hovestadt W.,
Müller A.,
Wurm B.
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930730103
Subject(s) - polymerization , copolymer , depolymerization , polymer chemistry , monomer , bifunctional , chemistry , ionic polymerization , ring opening polymerization , polymer , ring (chemistry) , chain growth polymerization , anionic addition polymerization , chain transfer , materials science , organic chemistry , radical polymerization , catalysis
The ring‐opening polymerization of cyclic monomers is a field of long tradition. More recently, however, under the pressure to recycle polymers the generally undesired capability of ring‐closing depolymerization has gained a new aspect. As an example, the anionic ring‐opening polymerization of six‐membered cyclic carbonates is discussed, the alcoholate being the active species. The latter is also able to initiate the ring‐opening polymerization of lactones such as ϵ‐caprolactone and pivalolactone. On the other hand, monofunctional and bifunctional alcoholates of polytetrahydrofuran can be used as initiators for the anionic ring‐opening polymerization of cyclic carbonates to produce AB‐ and ABA‐block copolymers. The use of other initiators than alcoholates on the basis of Al, Zn, and Sn is discussed for both the polymerization and the depolymerization reaction.