Ring-opening (ROP) versus ring-expansion (REP) polymerization of ε-caprolactone to give linear or cyclic polycaprolactones

José A. Castro-Osma, Carlos Alonso-Moreno, Joaquín C. García-Martinez, Juan Fernández-Baeza, Luis F. Sánchez-Barba, Agustín Lara-Sánchez*, Antonio Otero

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Macromolecular engineering of cyclic polycaprolactones has been carried out by a ring-expansion procedure catalyzed by a series of alkyl-organoaluminum initiators. The single-site nature of the initiators allows a very well-controlled macrolactonization process to give moderate to high molecular weight cyclic polymers with narrow polydispersities. Cyclic architectures are supported by a combination of techniques such as viscosity measurements, NMR, and MALDI-TOF MS analysis.

Original languageEnglish
Pages (from-to)6388-6394
Number of pages7
Issue number16
Early online date16 Aug 2013
Publication statusPublished - 27 Aug 2013

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