Hanik, Nils Kilbinger, Andreas F. M. 2016-03-01 Today's olefin metathesis catalysts show high reactivity, selectivity, and functional group tolerance and allow the design of new syntheses of precisely functionalized polymers. Here the synthesis of a new end-capping reagent is investigated allowing the introduction of a highly reactive activated ester end-group at the polymer chain end as well as its prefunctionalization to directly introduce functional moieties. The versatility of this new end-capping reagent is demonstrated by utilizing it to synthesize a so-called termimer (a monomer with termination capabilities). Copolymerization of a norbornene derivative with the termimer leads to hyperbranched ring-opening metathesis polymerization polymers as proven by gel permeation chromatography and MALDI-ToF-(matrix-assisted laser desorption/ionization time of flight) mass spectrometry. application/pdf https://folia.unifr.ch/global/documents/304864 https://folia.unifr.ch/documents/304864/files/kil_bpr.pdf https://folia.unifr.ch/documents/304864/files/kil_bpr_sm.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1002/marc.201500628 info:eu-repo/semantics/openAccess License undefined Macromolecular Rapid Communications. - 2016, vol. 37, no. 6, p. 532–538 functional termination Grubbs catalysts hyperbranched polymers ring opening metathesis polymerization info:eu-repo/classification/udc/54 Branched polymers via ROMP of termimers http://purl.org/coar/resource_type/c_6501