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- Title
Proton-Transfer Polymerization (HTP): Converting Methacrylates to Polyesters by an N-Heterocyclic Carbene.
- Authors
Hong, Miao; Chen, Eugene Y. ‐ X.
- Abstract
A new polymerization termed proton (H)-transfer polymerization (HTP) has been developed to convert dimethacrylates to unsaturated polyesters. HTP is catalyzed by a selective N-heterocyclic carbene capable of promoting intermolecular Umpolung condensation through proton transfer and proceeds through the step-growth propagation cycles via enamine intermediates. The role of the added suitable phenol, which is critical for achieving an effective HTP, is twofold: shutting down the radically induced chain-growth addition polymerization under HTP conditions (typically at 80-120 °C) and facilitating proton transfer after each monomer enchainment. The resulting unsaturated polyesters have a high thermal stability and can be readily cross-linked to robust polyester materials.
- Subjects
POLYMERIZATION research; CHEMICAL reactions; PROTON transfer reactions; CARBENES; MONOMERS
- Publication
Angewandte Chemie, 2014, Vol 126, Issue 44, p12094
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201406630