Mono-telechelic polymers by catalytic living ring-opening metathesis polymerization with second-generation Hoveyda–Grubbs catalyst
- Liu, Peng Department of Chemistry - University of Fribourg - 1700 Fribourg - Switzerland
- Dong, Zhenghao Department of Chemistry - University of Fribourg - 1700 Fribourg - Switzerland
- Kilbinger, Andreas F. M. Department of Chemistry - University of Fribourg - 1700 Fribourg - Switzerland
- 27.08.2020
Published in:
- Materials Chemistry Frontiers. - 2020, vol. 4, no. 9, p. 2791–2796
English
The second-generation Hoveyda–Grubbs (HG2) catalyst, which has a small initiation to propagation rate ratio (ki/kp) in ring-opening metathesis polymerization (ROMP), was successfully used in a recently developed catalytic living ROMP. This proved that slow-initiating catalysts can enable ROMP in a living fashion to produce polymers with narrow dispersity and controlled molecular weight. The molecular weight control experiments show a linear relationship between polymer molecular weight and monomer to chain-transfer agent (CTA) ratio. Different norbornene-derivatives can be utilized as monomers. Di-block copolymers and tri-block copolymers can be synthesized either using the first polymer block as macro-CTA or continuously adding different monomers sequentially. Mono-telechelic polymers, with functional end groups such as protected carboxylic acid, alcohol and amine can also be achieved. All polymers were fully characterized using NMR, GPC and MALDI-ToF analytical techniques. This procedure provides access to well-defined end-functional polymers at lower cost and with reduced rare metal residues that might be of interest for biomedical, materials, industrial and academic use.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
-
- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
-
- RERO DOC 329899
- DOI 10.1039/D0QM00417K
- Persistent URL
- https://folia.unifr.ch/unifr/documents/309104
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