Multiarm star block and multiarm star mixed‐block copolymers via azide‐alkyne click reaction |
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Authors: | Hakan Durmaz Aydan Dag Elif Erdogan A Levent Demirel Gurkan Hizal Umit Tunca |
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Institution: | 1. Department of Chemistry, Istanbul Technical University, Maslak, Istanbul 34469, Turkey;2. Department of Chemistry, Koc University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey |
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Abstract: | The synthesis of multiarm star block (and mixed‐block) copolymers are efficiently prepared by using Cu(I) catalyzed azide‐alkyne click reaction and the arm‐first approach. α‐Silyl protected alkyne polystyrene (α‐silyl‐alkyne‐PS) was prepared by ATRP of styrene (St) and used as macroinitiator in a crosslinking reaction with divinyl benzene to successfully give multiarm star homopolymer with alkyne periphery. Linear azide end‐functionalized poly(ethylene glycol) (PEG‐N3) and poly (tert‐butyl acrylate) (PtBA‐N3) were simply clicked with the multiarm star polymer described earlier to form star block or mixed‐block copolymers in N,N‐dimethyl formamide at room temperature for 24 h. Obtained multiarm star block and mixed‐block copolymers were identified by using 1H NMR, GPC, triple detection‐GPC, atomic force microscopy, and dynamic light scattering measurements. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 99–108, 2010 |
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Keywords: | atomic force microscopy (AFM) azide‐alkyne click reaction dynamic light scattering (DLS) GPC multiarm star polymer triple detection‐GPC |
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