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Updating radical ring-opening polymerisation of cyclic ketene acetals from synthesis to degradation

Folini, J. and Murad, W. and Mehner, F. and Meier, W. and Gaitzsch, J.. (2020) Updating radical ring-opening polymerisation of cyclic ketene acetals from synthesis to degradation. European Polymer Journal, 134. p. 109851.

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Abstract

Radical ring-opening polymerisation (RROP) of cyclic ketene acetals (CKAs) has gained momentum as it yields polyesters as biodegradable polymers from a radical polymerisation. In order to advance the polymerisation, some of its major limitations were addressed in the research presented, focussing on the four mainly used CKAs in modern research on RROP. Monomer synthesis has been updated towards a cobalt/TMSCl-based system that was performed reliably on several monomers at room temperature. Calculations using the density functional theory (DFT) revealed that the ring-opening step is energetically hampered in comparison to a ring-retaining reaction, which explained the challenges faced to promote the ring-opening reaction. Higher molecular weights up to four times the values reached by thermally initiated polymerisation were obtained by exploiting UV light and ultrasound as alternative methods to facilitate the polymerisation. The reaction procedure also influenced thermal properties of the polymers, which in turn affected the enzymatic degradation of nanoparticles based on those polymers. Altogether, the present study offers a holistic update to enhance the RROP of CKAs.
Faculties and Departments:05 Faculty of Science > Departement Chemie
05 Faculty of Science > Departement Chemie > Chemie > Makromolekulare Chemie (Meier)
UniBasel Contributors:Meier, Wolfgang P.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0014-3057
e-ISSN:1873-1945
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:10 Feb 2021 10:39
Deposited On:10 Feb 2021 10:39

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