Jean‐François Lutz, H. Börner, Katja Weichenhan
Apr 6, 2005
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Influential Citations
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Quality indicators
Journal
Macromolecular Rapid Communications
Abstract
Summary: The bromine chain ends of well-defined polystyrene ( = 2 700 g · mol−1, = 1.11) prepared using ATRP were successfully transformed into various functional end groups (ω-hydroxy, ω-carboxyl and ω-methyl-vinyl) by a two-step pathway: (1) substitution of the bromine terminal atom by an azide function and (2) 1,3-dipolar cycloaddition of the terminal azide and functional alkynes (propargyl alcohol, propiolic acid and 2-methyl-1-buten-3-yne). The “click” cycloaddition was catalyzed efficiently by the system copper bromide/4,4′-di-(5-nonyl)-2,2′-bipyridine. In all cases, 1H NMR spectra indicated quantitative transformation of the chain ends of polystyrene into the desired function. Preparation of well-defined functional polymers possessing diverse chain-end functionalities by the combination of atom transfer radical polymerization and click chemistry.